abs rules for building & classing steel vessels under 90m in length part5 2006

P a r t 5 : S p e c i a l i z e d V e s s e l s a n d S e r v i c e s

RULES FOR BUILDING AND CLASSING

STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH 2006

PART 5 SPECIALIZED VESSELS AND SERVICES

American Bureau of Shipping Incorporated by Act of Legislature of the State of New York 1862

Copyright 2005 American Bureau of Shipping ABS Plaza 16855 Northchase Drive Houston, TX 77060 USA

ii ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

R u l e C h a n g e N o t i c e ( 2 0 0 6 )

Rule Change Notice (2006) The effective date of each technical change since 1993 is shown in parenthesis at the end of the subsection/paragraph titles within the text of each Part. Unless a particular date and month are shown, the years in parentheses refer to the following effective dates:

(2000) and after 1 January 2000 (and subsequent years) (1996) 9 May 1996 (1999) 12 May 1999 (1995) 15 May 1995 (1998) 13 May 1998 (1994) 9 May 1994 (1997) 19 May 1997 (1993) 11 May 1993

Listing by Effective Dates of Changes from the 2001 Rules

EFFECTIVE DATE 1 January 2006 shown as (2006) (based on the contract date for new construction between builder and Owner)

Part/Para. No. Title/Subject Status/Remarks 5-8-A2/3.27 To reflect ABS survey practice for new construction

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 iii

P A R T F o r e w o r d

5

Foreword This book, Part 5 Specialized Vessels and Services, specifies the requirements for each vessel intended to operate for special service.

Since the requirements for the following seven types of vessel are identical to those requirements in the Rules for Building and classing Steel Vessels, the following cross-reference table is provided, instead of duplication of the text herein:

Rules for Building and Classing Steel Vessels Under 90 meters (295 feet) in Length

Chapter Title

Applicable Chapter(s) of the Rules for Building and Classing Steel Vessels

Chapter 1 Vessels Intended for Navigation in Ice Part 6, Chapter 1

Chapter 2 Vessels Intended to Carry Oil in Bulk Part 5C, Chapter 2

Chapter 3 Vessels Intended to Carry Ore or Bulk Cargoes Part 5C, Chapter 4

Chapter 4 Vessels Intended to Carry Liquefied Gases and Chemical Cargoes

Part 5C, Chapters 8 & 9

Chapter 5 Vessels Intended to Carry Passengers Part 5C, Chapter 7 *

Chapter 6 Vessels Intended to Carry Containers Part 5C, Chapter 6

Chapter 7 Vessels Intended to Carry Vehicles Part 5C, Chapter 10

* This Chapter is currently replaced by the ABS Guide for Building and Classing Passenger Vessels, 2001. This Guide may be viewed and downloaded from the ABS website www.eagle.org/rules/downloads.html.

The requirements for all other unique vessel types are specified in this booklet.

iv ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

P A R T T a b l e o f C o n t e n t s

5 Specialized Vessels and Services

CONTENTS CHAPTER 8 Vessels Intended for Towing................................................................. 1

Section 1 General ..................................................................................3 Section 2 Stability...................................................................................5 Section 3 Towing Gear ..........................................................................6 Section 4 Vessel Design ........................................................................7 Section 5 Equipment..............................................................................8 Section 6 Tests ......................................................................................9 Appendix 1 Intact Stability Guidelines for Towing Vessels.....................10 Appendix 2 Guidelines for Bollard Pull Test Procedure..........................13

CHAPTER 9 Fire Fighting Vessels ........................................................................... 15

Section 1 General ................................................................................18 Section 2 Plans and Calculations ........................................................20 Section 3 Seakeeping and Stability .....................................................22 Section 4 Fire Fighting Systems ..........................................................23 Section 5 Fixed Water-spray System...................................................26 Section 6 Special Equipment ...............................................................27 Section 7 Structural Fire Protection .....................................................29 Section 8 Surveys ................................................................................30 Appendix 1 Intact Stability Guidelines for Fire Fighting Vessels ............31

CHAPTER 10 Vessels Intended for Support Services to Offshore Installations.... 34

Section 1 General ................................................................................36 Section 2 Stability.................................................................................38 Section 3 Vessel Design ......................................................................39 Section 4 Anchor Handling ..................................................................42 Section 5 Well Stimulation ...................................................................43 Section 6 Carriage of Limited Amounts of Hazardous and Noxious

Liquid Substances................................................................44 Appendix 1 Intact Stability Guidelines for Offshore Support Vessels .....45 Appendix 2 Damage Stability Guidelines for Offshore Support

Vessels.................................................................................47

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 v

CHAPTER 11 Oil Recovery Vessels........................................................................... 49 Section 1 General ................................................................................52 Section 2 Definitions ............................................................................54 Section 3 Hull Construction and Equipment ........................................56 Section 4 Machinery Equipment and Systems ....................................58 Section 5 Vessels Intended for Recovery of Oil with a Flash Point

Above 60C (140F).............................................................62 CHAPTER 12 Safety Standby Service Vessels ......................................................... 64

Section 1 General ................................................................................66 Section 2 Definitions ............................................................................67 Section 3 General Requirements.........................................................68 Section 4 Accommodation for Survivors..............................................70 Section 5 Rescue and Safety Equipment ............................................73 Section 6 Navigation and Communication Equipment ........................76 Section 7 Surveys ................................................................................77

CHAPTER 13 Escort Vessels...................................................................................... 78

Section 1 General ................................................................................80 Section 2 Plans and Data ....................................................................81 Section 3 Definitions ............................................................................82 Section 4 Intact Stability.......................................................................84 Section 5 Fire Fighting Capability ........................................................86 Section 6 Towing Gear ........................................................................87 Section 7 Vessel Design ......................................................................89 Section 8 Verification of Steering Capability........................................90 Section 9 Tests and Surveys ...............................................................91

CHAPTER 14 Fishing Vessels .................................................................................... 92

Section 1 General ................................................................................95 Section 2 Vessel Design ......................................................................97 Section 3 Intact Stability.....................................................................102 Section 4 Equipment..........................................................................116 Section 5 Machinery Equipment and Systems ..................................117 Section 6 Surveys ..............................................................................118

APPENDIX 1 Requirements for Building and Classing Vessels Intended for

Service in Domestic Waters .............................................................. 119

This Page Intentionally Left Blank

ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006 1

P A R T C h a p t e r 8 : V e s s e l s I n t e n d e d f o r T o w i n g

5 C H A P T E R 8 Vessels Intended for Towing

CONTENTS SECTION 1 General.................................................................................................... 3

1 Application ..........................................................................................3 3 Classification.......................................................................................3

3.1 Tugs ................................................................................................3 3.3 Dual Purpose Vessels .....................................................................3

5 Optional Record Entries......................................................................3 5.1 Quick Release .................................................................................3

7 Submission of Data.............................................................................3 9 Definitions ...........................................................................................4

9.1 Static Bollard Pull ............................................................................4 9.3 Reference Load...............................................................................4

SECTION 2 Stability ................................................................................................... 5

1 Intact Stability During Tow ..................................................................5 SECTION 3 Towing Gear ........................................................................................... 6

1 Arrangement .......................................................................................6 3 Quick Release Device.........................................................................6 5 Strength...............................................................................................6

5.1 Towline ............................................................................................6 5.3 Towing Hook, Towing Winch, Towing Bollard and Towing Bitts ...... 6 5.5 Supporting Structures......................................................................6 5.7 Connections ....................................................................................6

SECTION 4 Vessel Design......................................................................................... 7

1 Side Shell and Frames........................................................................7 3 After Deck ...........................................................................................7 5 Weather Deck Openings.....................................................................7

SECTION 5 Equipment............................................................................................... 8 SECTION 6 Tests........................................................................................................ 9

1 Quick Release Test.............................................................................9 3 Static Bollard Pull Test........................................................................9

2 ABS RULES FOR BUILDING AND CLASSING STEEL VESSELS UNDER 90 METERS (295 FEET) IN LENGTH . 2006

APPENDIX 1 Intact Stability Guidelines for Towing Vessels .................................. 10 1 General .............................................................................................10 3 Submission of Plans .........................................................................10 5 Intact Stability Criteria .......................................................................10 7 Standard Loading Conditions............................................................11

7.1 Loading Conditions ........................................................................11 7.3 Load Considerations......................................................................11

9 Heeling Arm Curve............................................................................11 11 Trim and Stability Booklet .................................................................12 TABLE 1 Towline Pull Force...................................................................12 FIGURE 1 Righting Arm and Heeling Arm Curves...................................11

APPENDIX 2 Guidelines for Bollard Pull Test Procedure ....................................... 13

1 General .............................................................................................13 3 Steady Bollard Pull Test Requirements ............................................13


P A R T S e c t i o n 1 : G e n e r a l


S E C T I O N 1 General

1 Application The requirements in this section apply to vessels intended for unrestricted towing service.

3 Classification

3.1 Tugs In accordance with 1-1-3/3 of the ABS Rules for Conditions of Classification (Part 1), the classification A1 Towing Vessel is to be assigned to vessels designed primarily for towing service and built to the requirements of this section and other relevant sections of the Rules.

3.1.1 Bollard Pull (2001) The static bollard pull, determined by an approved bollard pull test in the presence of the Surveyor, will be indicated in the Record. See 5-8-6/3.

3.3 Dual Purpose Vessels Vessels intended for towing and other services, such as supplying stores to offshore units and installations, may be classed A1 Towing Vessel. Alternatively, at the request of the Owner, these vessels may be classed A1 with an appropriate notation in column 5 of the Record, for example, Combination Tug & Support Vessel. In both instances, the dual purpose vessel is to be designed and built to these requirements, in addition to those as may be applicable for the particular services.

5 Optional Record Entries

5.1 Quick Release At the request of the owner and where a remotely controlled quick release device is provided for the towing hook or towing winch, in accordance with 5-8-3/3, 5-8-3/5.3 and 5-8-6/1, the letters QR will be entered in the column 5 of the Record.

7 Submission of Data In general, in addition to the plans listed in 1-1-4/1 of the Supplement to the ABS Rules for Conditions of Classification (Part 1) and 4-1-1/7 of these Rules, the following plans and particulars are to be submitted.

Structural details and arrangements of the structures in way of the towing hook, towing winch, or towing bollards, or bitts, towing guide rollers and fairleads.

Details of connections (See 5-8-3/5.7). Braking power of winch. (2001) Estimated static bollard pull, together with the method of prediction. (The estimated value is to

be confirmed at Trials prior to certification.)

Part 5 Specialized Vessels and Services Chapter 8 Vessels Intended for Towing Section 1 General 5-8-1


Minimum specified breaking strength of towline. Stability data and calculations. (2001) Static Bollard Pull Test Procedure.

9 Definitions

9.1 Static Bollard Pull (2001) Static bollard pull (BP) for use in 5-8-1/9.3 is the value submitted by the designer, in accordance with 5-8-1/7.

Static bollard pull will be entered in the Record, in accordance with 5-8-1/3.1. BP for use in 5-8-1/9.3 is to be taken as not less than the design value nor more than the value obtained by testing and published in the Record. See 5-8-6/3.

9.3 Reference Load Reference Load (RL) in the design and testing of towing gear is 2BP. For BP greater than 51 tf (50 Ltf), consideration will be given to a reduction in RL. For a BP of 51 tf (50 Ltf), RL is 2BP and for a BP of 153 tf (150 Ltf) or more, RL may be taken as 1.33BP, with interpolation for intermediate values of BP.


P A R T S e c t i o n 2 : S t a b i l i t y


S E C T I O N 2 Stability

1 Intact Stability During Tow The intact stability of the vessel for towing operation is to comply with a recognized standard. The submission of evidence showing approval by an Administration of stability of the vessel for the static bollard pull (see 5-8-1/9.1) will be acceptable. Alternatively, upon request, the review will be performed by ABS. See Appendix 5-8-A1 for ABS guidelines.


P A R T S e c t i o n 3 : T o w i n g G e a r


S E C T I O N 3 Towing Gear

1 Arrangement The towing hook, towing winch, towing bitt or towing bollard is to be located as low as is practicable, and close to, but abaft of, the center of gravity of the towing vessel in the expected towing condition.

Rollers or fairleads are to be arranged so as to contain the towline within the design limit of its sweep.

Effective means are to be provided to lead and restrain the towline over the stern of the towing vessel.

3 Quick Release Device Where entry QR in column 5 of the Record is requested in accordance with 5-8-1/5.1, the quick release device for the towing hook or towing winch is to be operable from the bridge or other normally manned location in direct communication with the bridge. The quick release device is to disengage the towline at any combination of expected trim and heel.

5 Strength

5.1 Towline The breaking strength of towline is to be not less than the Reference Load (RL). See 5-8-1/9.3.

5.3 Towing Hook, Towing Winch, Towing Bollard and Towing Bitts The towing hook, towing winch, towing bollard and towing bitt are to be capable of sustaining RL without permanent deformation. These items are to comply with a recognized standard or code of practice. Name plates indicating the names of standard, rated load, speed, mass, etc., will be acceptable for that purpose. Other means for verifying compliance will also be considered.

The installation of these items is to be to the satisfaction of the Surveyor.

5.5 Supporting Structures The stresses in the structures supporting the items in 5-8-3/5.3 are not to exceed the following under a pull of RL applied horizontally and within a range of 30 degrees from the centerline of the vessel on each side.

Normal Stress = 0.75Y

Shear Stress = 0.45Y

where

Y = specified minimum tensile yield strength or yield point.

In addition, the buckling strength is to be adequate for the above loading.

5.7 Connections The size and arrangement of holding down bolts and welds for towing hook or towing winch are to be in accordance with a recognized standard.


P A R T S e c t i o n 4 : V e s s e l D e s i g n


S E C T I O N 4 Vessel Design

1 Side Shell and Frames For vessels subject to impact loadings during routines, it is recommended that side frames with section modulus 25% greater than that obtained from 3-2-5/3.1, 3-2-5/5.1 or 3-2-5/5.3 be considered. For side shell plating, see 3-2-2/5.3.

3 After Deck Deck fittings within the sweep of towline are to be protected against contact by the towline and against the towline fouling.

5 Weather Deck Openings Openings in the weather deck intended to be used at sea and leading to spaces below the freeboard or superstructure deck, including emergency exits, are to be protected as required in 3-2-12/23.3 with sill height of doors at least as required by 3-2-12/Table 1 for companionways.

Access openings, including emergency exits, are to be located clear of the towline sweep area.


P A R T S e c t i o n 5 : E q u i p m e n t


S E C T I O N 5 Equipment

Equipment is to be in accordance with Section 3-5-1, except that the equipment number (EN) may be calculated using 3-5-1/3.5. The number, weight and sizes of equipment differing from 3-5-1/Table 1 may be specially considered for limited service. See also 1-1-3/11 of the ABS Rules for Conditions of Classification (Part 1).


P A R T S e c t i o n 6 : T e s t s


S E C T I O N 6 Tests

In addition to the tests required by the relevant sections, the following tests are to be conducted to the satisfaction of the Surveyor.

1 Quick Release Test (2005) Where the entry QR in the Record is requested in accordance with 5-8-1/5.1, the effectiveness of the quick release device is to be demonstrated during initial sea trial. The test is to be conducted to the manufacturers recommendations.

3 Static Bollard Pull Test (1 July 2008) The static bollard pull test procedure is to be submitted for review by the attending Surveyor in advance of the test.

The first vessel of a series is to have a bollard pull test conducted in all cases. The requirements for conducting a bollard pull test on vessels of duplicate design and built in a series will be specially considered on a case-by-case basis. However, a bollard pull test certificate will only be issued to those vessels for which the BP notation is requested and the bollard pull test is actually carried out.

The static bollard pull is to be measured with the tug at the maximum continuous rpm and at or near the maximum towing depth. The towed vessel is to be in ballast condition but need not be down to the summer load line mark.

The static bollard pull is the pull that is recorded over the state of equilibrium without any tendency to decline.

The depth of water under the keel in the testing area should be at least two times the vessel draft at amidship.

For additional test criteria, see Appendix 5-8-A2 Guidelines for Bollard Pull Test Procedure of these Rules.


P A R T A p p e n d i x 1 : I n t a c t S t a b i l i t y G u i d e l i n e s f o r T o w i n g V e s s e l s


A P P E N D I X 1 Intact Stability Guidelines for Towing Vessels (1998)

1 General The intact stability of each towing vessel is to be evaluated for the loading conditions indicated in 5-8-A1/7 for compliance with the intact stability criteria in Section 5-8-2, and the results are to be submitted.

For every loading condition, which is to be shown in the Trim and Stability Booklet, the righting arm curve (GZ curve) should be plotted using the VCG corrected for the free surface effects of liquid in tanks.

3 Submission of Plans The following drawings are to be submitted with the Trim and Stability Booklet for our review:

i) General arrangement plan

ii) Capacity plan or table with centers of gravity

iii) Lines plan

iv) Hydrostatic curve or table

v) Cross curves of stability

vi) Downflooding angle versus draft curve. The downflooding angle is the first of the angle of heel at which openings in the hull, superstructures or deck houses which cannot be closed weathertight immerse.

5 Intact Stability Criteria The following stability criteria are to be complied with:

i) The area under the righting lever curve (GZ curve) should not be less than 0.055 meter-radians (10.3 ft-degrees) up to = 30 angle of heel and not less than 0.09 meter-radians (16.9 ft-degrees) up to = 40 or the angle of flooding f, if this angle is less than 40. Additionally, the area under the righting lever curve (GZ curve) between the angles of heel of 30 and 40 or between 30 and f, if this angle is less than 40, is not to be less than 0.03 meter-radians (5.6 ft-degrees).

ii) The righting lever GZ is to be at least 0.20 m (0.66 ft) at an angle of heel equal to or greater than 30.

iii) The maximum righting arm is to occur at an angle of heel not less than 25. iv) The initial metacentric height, GM0, is not to be less than 0.15 m (0.49 ft).

v) The area of the residual dynamic stability (area between righting and heeling arm curves to the right of the first intercept) up to an angle of heel of 40 plus the angle of the first intercept (A1 + A2), or the angle of downflooding, if this angle is less than 40 plus the angle of the first intercept (A1), should not be less than 0.09 meter-radians. (See 5-8-A1/Figure 1.)

Part 5 Specialized Vessels and Services Chapter 8 Vessels Intended for Towing Appendix 1 Intact Stability Guidelines for Towing Vessels 5-8-A1


FIGURE 1 Righting Arm and Heeling Arm Curves

A1 A2

40

RightingArm Downflooding

Angle

HeelingArm

FirstIntercept

Rig

htin

g A

rm (G

Z)

Heel Angle

7 Standard Loading Conditions

7.1 Loading Conditions The following conditions of loading are to be examined in the Trim and Stability Booklet:

i) Vessel with full stores and fuel;

ii) Vessel with 10 percent stores and fuel remaining;

iii) Any other normal conditions, both departure and arrival that the Owner feels are appropriate or more suitable to the vessels trade.

7.3 Load Considerations The following are the assumptions for calculating loading conditions:

i) In Loading Condition 5-8-A1/7.1i) above, it should be assumed that the vessel is loaded to its assigned load line with water ballast tanks empty.

ii) If any loading condition water ballast is necessary, additional diagrams should be calculated, taking into account the water ballast. Its quantity and disposition should be stated.

iii) In calculating the free surface corrections, it should be assumed that for each type of liquid, at least one transverse pair or a single centerline tank has a free surface and the tank or combination of tanks that is to be taken into account should be those where the effect of free surface is the greatest.

9 Heeling Arm Curve The heeling moment due to the towline pull should be calculated using the corresponding percentage of the maximum bollard pull, depending on the type of propulsion (see below), at right angles to the vessels fore and aft axis. The resultant moment should be converted to a heeling arm and plotted on the same graph as the righting arm curve (GZ curve). The heeling arm curve can be taken to vary with the cosine of the heeling angle.

Regarding the bollard pull force, the value is usually requested as it is derived from the actual test at maximum RPM. However, in preliminary considerations, a calculated value would be accepted based on the corresponding value of pounds of bollard pull force per SHP, depending on the type of propulsion (see 5-8-A1/Table 1). The heeling arm should be taken from the top of the towing bitt to the VCB or for an approximation to 1/2 the mean draft.

Part 5 Specialized Vessels and Services Chapter 8 Vessels Intended for Towing Appendix 1 Intact Stability Guidelines for Towing Vessels 5-8-A1


11 Trim and Stability Booklet The Master of the vessel should receive information in the Trim and Stability Booklet regarding ballasting, towing, etc., to ensure that the stability is in compliance with the criteria given in 5-8-A1/5.

The Trim and Stability Booklet should also contain a table giving the free surface moments for all tanks designed for liquid. If any set of tanks are cross-connected, the free surface moment shall be calculated about the vessels centerline.

TABLE 1 Towline Pull Force

Type of Propulsion

Bollard Pull

(lbs/SHP)

Percentage of Bollard Pull

at 90 Twin screw with open propellers, or other types not listed below

30 50%

Twin screw with open propellers and flank rudders

30 50%

Twin screw with conventional non-movable nozzles

35 50%

Water Tractor Tug with twin propeller Z-drives (steerable propellers with nozzles)

35 70%

Water Tractor with twin cycloidal propellers (vertical axis)

30 70%


P A R T A p p e n d i x 2 : G u i d e l i n e s f o r B o l l a r d P u l l T e s t P r o c e d u r e


A P P E N D I X 2 Guidelines for Bollard Pull Test Procedure (2001)

1 General This Appendix is prepared as a guide for compliance with the requirements of 5-8-6/3.

Prior to conducting the steady bollard pull test, a written request should be received from the Owner of ABS attendance and addressing items 5-8-A2/3.15 and 5-8-A2/3.17 below. Only ABS-classed vessels may be attended for the test.

3 Steady Bollard Pull Test Requirements

3.1 The towing vessel should be on an even keel or trimmed to the intended operating condition in tow.

3.3 The draft of the towing vessel should be equal to or deeper than ballast condition, but need not be down to the summer load line mark.

3.5 Depth of water under the keel and on each side of the vessel should be at least 2 vessel draft at midship.

3.7 If current exceeds 1 knot, its effect is to be subtracted from the bollard pull by either:

i) Direct measurement of drag effect (pulling direction downstream) and reduction of bollard pull accordingly; or,

ii) Conducting pull test both upstream and downstream and averaging the results.

3.9 The distance from the stern of the towing vessel to the bollard (fixed point) should be at least two ship lengths and be unobstructed by submerged pilings, bulwarks etc.

3.11 Wind speed should be 10 mph or less, or such that it does not measurably effect the bollard pull results.

3.13 Sea condition should be calm.

3.15 A statement should be obtained from the vessels Master or Owners Representative that the propellers are those approved by ABS for the vessel.

Part 5 Specialized Vessels and Services Chapter 8 Vessels Intended for Towing Appendix 2 Guidelines for Bollard Pull Test Procedure 5-8-A2


3.17 The Owners should be satisfied as to the structural adequacy of the towing hawser, towing winch or tow bitts employed during the test.

3.19 The vessels stability letter should include the towing condition.

3.21 The dynamometer (load cell) used for the test should be calibrated and suitable for use in the horizontal position. It should be fitted with swivels or should be torque insensitive, such as a hydraulic dynamometer. It should be easily read from a safe location or a remote readout should be provided. A continuous recording device is suggested but not mandatory. It is suggested that the maximum scale reading be, as a minimum, at least equal to [Max. Cont. Total H.P. 50 (LBS.)]. The dynamometer should be located at the ashore end of the tow hawser.

3.23 The vessels main engines should not be adjusted to operate in overload condition. Engine overspeed trip setting should be verified prior to commencing the test.

3.25 The Steady Bollard Pull should be computed as the average of evenly spaced load cell recordings taken over a sustained pull interval of three to five minutes. If the tow hawser is not horizontal, the vertical angle of the hawser is to be measured and used to obtain the actual horizontal thrust.

Engine temperatures should be at steady state during the test run. Engines should be operated at the ABS maximum continuous horsepower (certified horsepower per the Record) during the test. Instantaneous spike bollard pull readings should be ignored.

3.27 (2006) In general, two Surveyors are required when conducting the test, one ashore and one in the engine room. A two-way voice communication system is to be provided for the test.

When a survey is carried out at the initial testing for new construction, consideration may be given to conducting the test with one Surveyor in engine room where a continuous recording device suitably calibrated is used to record the bollard pull. This relaxation of two Surveyor requirements is to be included in a written request submitted as noted in 5-8-A2/1.


P A R T C h a p t e r 9 : F i r e F i g h t i n g V e s s e l s

5 C H A P T E R 9 Fire Fighting Vessels

CONTENTS SECTION 1 General.................................................................................................. 18

1 Classification.....................................................................................18 3 Additional Coverage of Fire Fighting Vessel Classification ..............18 5 Special Vessels with Fire Fighting Capabilities ................................18 TABLE 1 Minimum Requirements for Fire Fighting Vessels ..................19

SECTION 2 Plans and Calculations........................................................................ 20

1 Plans .................................................................................................20 1.1 Hull Plans ...................................................................................... 20 1.3 Fire Fighting Plans and Data ......................................................... 20

3 Calculations ......................................................................................21 5 Additional Data..................................................................................21

SECTION 3 Seakeeping and Stability ..................................................................... 22

1 Stability..............................................................................................22 1.1 General..........................................................................................22 1.3 Light Ship Weight and Center of Gravity ....................................... 22

3 Maneuverability.................................................................................22 3.1 Thrusters and Propulsion Machinery............................................. 22 3.3 Positioning.....................................................................................22 3.5 Control...........................................................................................22

SECTION 4 Fire Fighting Systems.......................................................................... 23

1 Water Monitors..................................................................................23 1.1 General..........................................................................................23 1.3 Location.........................................................................................23 1.5 Supports ........................................................................................23

3 Monitor Control .................................................................................23 3.1 Operation.......................................................................................23 3.3 Control...........................................................................................23

5 Prime Movers, Pumps and Piping for Water Monitors and Water Spray.................................................................................................23 5.1 General..........................................................................................23 5.3 Pumps ...........................................................................................23 5.5 Piping Systems..............................................................................24 5.7 Suction and Discharge Velocity.....................................................24 5.9 Prime Movers ................................................................................24


7 Sea Suction.......................................................................................24 9 Sea Suction Strainer Plates and Valves ...........................................24

9.1 Valves ............................................................................................24 9.3 Operation of Pump and Valves ......................................................24

11 Hose Stations....................................................................................24 11.1 Number ..........................................................................................24 11.3 Stations..........................................................................................24 11.5 Location .........................................................................................25

13 Foam Generators (FFV Class 2 or 3) ...............................................25 15 Foam Monitor System (FFV Class 3) ...............................................25

15.1 Capacity.........................................................................................25 15.3 Arrangements ................................................................................25 15.5 Control ...........................................................................................25

SECTION 5 Fixed Water-spray System................................................................... 26

1 General .............................................................................................26 3 Water-spray System Capacity ..........................................................26 5 Spray System Pumps .......................................................................26 7 Maintenance......................................................................................26 TABLE 1 Minimum Requirements for Water Capacity ...........................26

SECTION 6 Special Equipment ............................................................................... 27

1 Firemans Outfit.................................................................................27 1.1 Number ..........................................................................................27 1.3 Components ..................................................................................27

3 Searchlights ......................................................................................27 3.1 Number ..........................................................................................27 3.3 Range ............................................................................................27

5 Recharging Equipment .....................................................................27 7 Fire Fighting Equipment Components ..............................................28 9 Equipment Certification.....................................................................28

SECTION 7 Structural Fire Protection .................................................................... 29

1 Exterior Boundaries ..........................................................................29 1.1 FFV Class 1 ...................................................................................29 1.3 FFV Class 2 and FFV Class 3 .......................................................29

3 Deadlights or Shutters ......................................................................29 5 Administration ...................................................................................29

SECTION 8 Surveys ................................................................................................. 30

1 General .............................................................................................30 3 Tests and Surveys ............................................................................30

3.1 Surveys During Construction .........................................................30


APPENDIX 1 Intact Stability Guidelines for Fire Fighting Vessels......................... 31 1 General .............................................................................................31 3 Submission of Plans .........................................................................31 5 Intact Stability Criteria .......................................................................31

5.1 General Criteria .............................................................................31 5.3 Fire Fighting Operations ................................................................ 31

7 Standard Loading Conditions ...........................................................33 7.1 Loading Conditions........................................................................ 33 7.3 Load Considerations .....................................................................33

9 Trim and Stability Booklet .................................................................33 FIGURE 1 Heeling Moments Fire Fighting Operations .........................32 FIGURE 2 Righting Arm and Heeling Arm Curves...................................32





1 Classification In accordance with 1-1-3/3 of the ABS Rules for Conditions of Classification (Part 1), the classification A1 Fire Fighting Vessel Class 1 will be assigned to vessels with water spray protection for cooling the Fire Fighting Vessels surfaces to enable close operation for early stages of fire fighting and rescue operations, with capabilities in accordance with 5-9-1/Table 1, built in compliance with these requirements and other relevant sections of the Rules. Where the vessel has been built in compliance with these requirements and for continuous fighting of large fires and cooling structures on fire, with capabilities in accordance with 5-9-1/Table 1, and other relevant sections of the Rules, the classification A1 Fire Fighting Vessel Class 2 or 3 will be assigned. Where A1 Fire Fighting Vessel Class 2 or 3 also meet A1 Fire Fighting Vessel Class 1 requirements, combined Class notation A1 Fire Fighting Vessel Class 1 and Class 2, or A1 Fire Fighting Vessel Class 1 and Class 3 may be given.

3 Additional Coverage of Fire Fighting Vessel Classification The following special items related to fire fighting operations are covered under classification:

Vessels fire fighting capabilities Vessels stability and its ability to maintain station while fire fighting monitors are in full operation The degree of vessels self-protection against external fires

5 Special Vessels with Fire Fighting Capabilities Vessels not in compliance with these Rules or not specifically built for the service intended to be covered by these Rules, but which have special fire fighting capabilities in addition to their regular service, may be specially considered and reviewed under the intent of these Rules as they relate to fire fighting. See also 5-9-1/1. Such vessels complying with these special requirements may be distinguished in the Record with their assigned designation followed by the special designation (Fire Fighting Capability) such as A1 Towing Vessel (Fire Fighting Capability). Data on the extent of this special fire fighting capability will be entered into the Record, and such special fire fighting systems will be subject to annual surveys.

Part 5 Specialized Vessels and Services Chapter 9 Fire Fighting Vessels Section 1 General 5-9-1


TABLE 1 Minimum Requirements for Fire Fighting Vessels

FFV Class 1, 2 and 3. Additional minimum requirements for foam operation, fixed water-spray systems, and searchlights are given in subsections 5-9-4/13, 5-9-5/3 and 5-9-6/3.

Class Notation Class 1 Class 2 Class 3 Number of water monitors 2 3 4 4 Discharge rate per monitor, m3/hour, (gpm) 1200 (5280) 2400 (10,560) 1800 (7920) 2400 (10,560) Number of pumps 12 24 24 Total capacity, m3/hour, (gpm) 2400 (10,560) 7200 (31,680) 9600 (44,240) Monitor range (1), m, (ft) 120 (394) 150 (492) 150 (492) Height, monitor (2), m, (ft) 45 (148) 70 (230) 70 (230) Number of hose connections each side of vessel 4 8 10 Number of firemans outfits 4 8 10 Fuel oil capacity (3), hours 24 96 96

Notes: 1 Range: measured horizontally from the monitor outlet to the mean impact area.

2 Height: minimum height of the trajectory of water monitor jet measured vertically from sea level assuming a mean impact area located at a horizontal distance not less than 70 m (230 ft) from the nearest part of the fire fighting vessel.

3 Fuel oil capacity is to include provisions for continuous operation of all monitors in addition to the total capacity of the vessels fuel oil tanks required for continuous fire fighting operations. See also 5-9-2/5.


P A R T S e c t i o n 2 : P l a n s a n d C a l c u l a t i o n s


S E C T I O N 2 Plans and Calculations

1 Plans In addition to the plans required to be submitted by Section 1-1-4 of the Supplement to the ABS Rules for Conditions of Classification (Part 1) and 4-1-1/7 of these Rules, the following additional plans are to be submitted in the same manner.

1.1 Hull Plans Structural fire protection details

Lines and offsets

Curves of form, or equivalent

Cross curves of stability

Capacity plan, giving centers of gravity and tank free surface corrections

1.3 Fire Fighting Plans and Data General arrangement plan detailing all fire fighting equipment, including the monitors, fire pumps, fire mains, hydrants, hoses, nozzles, water-spray systems, firemen outfits.

Details of pumps and monitors, including locations, capacities and the range of the monitors delivery capabilities, including water-spray system capacity data (when fitted).

Details of high pressure air compressor required for filling cylinders of air breathing apparatus, including purity specifications.

Foundations for fire fighting pumps, their prime movers and the water monitors.

Sea chest arrangements for fire fighting systems.

Remote and local control arrangements for monitors.

For FFV Class 1 only:

Water-spray piping systems, including location of nozzles, pumps and valves, with system corrosion protection arrangements.

For FFV Class 2 or 3:

Details of foam generators and their capacity.

For FFV Class 3:

Foam monitor arrangements, capacity and supports, including remote and local control arrangement for the foam monitors.

Part 5 Specialized Vessels and Services Chapter 9 Fire Fighting Vessels Section 2 Plans and Calculations 5-9-2


3 Calculations (2005) The following calculations are to be submitted.

Calculations demonstrating the adequacy of the vessels stability during all fire fighting operations. See also 5-9-3/1.

Calculations demonstrating adequacy of monitor supports during monitor operations. See also 5-9-4/1.5. Calculations demonstrating adequacy of propulsion power required for the vessel to maintain station

during firefighting operations. See 5-9-3/3.5.

Submitted calculations are to be suitably documented.

5 Additional Data In addition to the submitted items required for classification, the following items are to be submitted.

i) Data indicating that the vessel will be capable of carrying sufficient fuel oil for continuous fire fighting operation and propulsion operation with all fixed water monitors in use at the maximum required capacity for not less than:

24 hours: FFV Class 1 96 hours: FFV Class 2 or 3

ii) Verification that FFV Class 3 will be capable of foam production from fixed foam monitors for at least 30 minutes continuous operation.

iii) Verification that FFV Class 2 or 3 will be capable of foam production from mobile generators for at least 30 minutes continuous operation.

iv) Verification that the water monitor range, required by 5-9-1/Table 1, is not less than:

120 meters (394 feet): FFV Class 1 150 meters (492 feet): FFV Class 2 or 3

v) Verification that the vessel is in compliance with the minimum requirements of 5-9-1/Table 1, with data on the vessels actual design capacities also recorded.

vi) Verification of light ship characteristics. See also 5-9-3/1.3.

vii) The Operating Booklet: It is incumbent upon the Owner to provide information, instructions, data and training for the fire fighting operations of the vessel to help assure that the loadings and operational limits upon which classification is based are not exceeded. An operating booklet detailing operation of the fire fighting installation, installation maintenance data, fire fighting procedures, equipment locations and capacity data, and particulars on maneuvering operations of the vessel during fire fighting or rescue operations are to be submitted for record or file. A copy of this operating booklet, in a language, or languages, understood by the crew, is to be placed onboard to provide data and information to the crew, and to be accessible to the Surveyor during survey. See also 5-9-6/9 and 5-9-8/1.

viii) Stability Information: Stability information in the form of a maximum KG versus draft curve, or in another suitable form, based upon the submitted stability calculations required by 5-9-2/3 for all fire fighting operations described in 5-9-3/1 is to be submitted to ABS for approval. This information is to be placed onboard the fire fighting vessel for the information of the Master and may become part of the operating booklet.


P A R T S e c t i o n 3 : S e a k e e p i n g a n d S t a b i l i t y


S E C T I O N 3 Seakeeping and Stability

1 Stability

1.1 General (2008) The intact stability of the vessel for fire fighting operation is to comply with a recognized standard. The submission of evidence showing approval by an Administration of stability of the vessel for the fire fighting operation will be acceptable. Alternatively, upon request, the review will be performed by ABS. See Appendix 5-9-A1 for ABS guidelines.

Stability calculations and corresponding information for the Master are to be submitted for review and approval, respectively. See 5-9-2/3 and 5-9-2/5.

1.3 Light Ship Weight and Center of Gravity An inclining test will be required for the first vessel of a series, when as near to completion as practical, to determine accurately the light ship weight and position of center of gravity. The inclining test is to be witnessed by a Surveyor.

For successive vessels of a series considered by ABS to be basically identical, submitted detailed weight calculations, accounting only for differences in weights and centers from the inclined vessel, will be satisfactory, provided their accuracy is confirmed by a deadweight survey witnessed by a Surveyor. Inclining experiment results, detailed weight calculations and deadweight survey results are to be submitted for review. See also 5-9-2/5.

3 Maneuverability

3.1 Thrusters and Propulsion Machinery The vessel is to have thrusters and propulsion machinery of sufficient power for maneuverability during fire fighting operations and as follows.

3.3 Positioning Thrusters and the vessels propulsion machinery are to be able to maintain the vessel on position in still water during all combinations of operation and capacity of the water monitors, at not more than 80 percent of available propulsion force in any direction.

3.5 Control (2005) Adequate operating control systems are to be provided for fire fighting operations which are to include an alarm condition at 80 percent of available propulsion power and automatic reduction of power action at 100 percent available propulsion power to prevent sudden or complete loss of power due to power overload. Calculations are to be submitted verifying that an equilibrium state between the reaction force from the water monitors and the force from the vessel's propulsion machinery and its side thrusters (at the most unfavorable combination) is at or less than 80 percent of the available propulsion power. This is to confirm that the vessel would maintain its position without setting off the 80 percent alarm condition. See 5-9-2/3.


P A R T S e c t i o n 4 : F i r e F i g h t i n g S y s t e m s


S E C T I O N 4 Fire Fighting Systems

1 Water Monitors

1.1 General Water monitor systems are to be in compliance with 5-9-1/Table 1.

1.3 Location Water monitors are to be located to allow for an unobstructed range of operation. Means are to be provided to prevent monitor jets from impinging on vessel structures and equipment.

1.5 Supports Monitor supports are to be adequately designed for all modes of operation, with particular attention given to loadings at maximum operation and from water jet reactions. Calculations demonstrating adequacy of the design are to be submitted. See also 5-9-2/3.

3 Monitor Control

3.1 Operation Monitors are to be capable of being operated and maneuvered both locally and at the remote-control station. The monitor remote-control station is to have adequate overall operational visibility, communications and protection.

3.3 Control Control systems are to be suitably protected from external damage. Electrical control systems are to be provided with overload and short circuit protection. Hydraulic or pneumatic monitor control systems are to be provided in duplicate. Shut-off and control equipment are to be clearly marked.

5 Prime Movers, Pumps and Piping for Water Monitors and Water Spray

5.1 General Pumps and piping systems used for water monitors are to be available for no service other than fire fighting and water spray. Independent sea suctions are to be provided for each pump.

5.3 Pumps (2010) Where two pumps are provided, they are to have equal or near equal capacity. Minimum total pump capacity requirements are given in 5-9-1/Table 1. Pumps are to have piping arrangements that will prevent overheating at low pump delivery rates. For fixed water-spray systems, see 5-9-5/1. Pumps for the fire fighting systems are to be tested in accordance with 4-4-2/1, regardless of vessel tonnage.

Part 5 Specialized Vessels and Services Chapter 9 Fire Fighting Vessels Section 4 Fire Fighting Systems 5-9-4


5.5 Piping Systems Piping systems are to be protected from overpressure. Piping systems used for water spray are to be independent from the system supplying water monitors, except that water monitor pumps may be used. See also 5-9-5/3. All piping is to be suitably protected from corrosion and freezing.

5.7 Suction and Discharge Velocity It is recommended that fire pump suction velocity generally not exceed 2 m/s (7 ft/s), and discharge piping to water monitors generally not exceed 4 m/s (13 ft/s) operational velocity to assure adequate system capacity. Data showing compliance with 5-9-1/Table 1 piping system capacities are to be submitted. See also 5-9-2/1.3.

5.9 Prime Movers (2010) 5.9.1 Internal Combustion Engines

Internal combustion engines of 100 kW (135 hp) and over that are associated with the fire fighting pumps are to comply with Part 4, Chapter 2 of the Steel Vessel Rules as applicable to engines intended for propulsion and for auxiliary services essential for propulsion, maneuvering and safety of the vessel.

5.9.2 Electric Motors Electric motors of 100 kW (135 hp) and over that are associated with the fire fighting pumps are to comply with 4-6-4/3.

7 Sea Suction Sea suction inlets for fire fighting are not to be used for any other purposes. Sea water inlets for fire fighting and sea chests are to be arranged as low as practical to avoid clogging due to debris or ice, and oil intake from seas surface. The location of sea water inlets for fire fighting and sea chest is to be such that water suction is not impeded by ship motions or water flow from propellers or thrusters.

9 Sea Suction Strainer Plates and Valves (2005)

9.1 Valves All sea water inlets and sea chests are to be fitted with strainer plates at the vessels shell. The strainer plates are to have a clear area of at least twice that of the sea valves. Low pressure steam, compressed air or other effective means are to be provided for clearing the strainer plates. Each sea water inlet for fire fighting is to be equipped with a shut off valve.

9.3 Operation of Pump and Valves The fire fighting pump, the sea water shut off valve and the sea water discharge valve are to be operable from the same locations. Starting of the fire fighting pump when the shut off valve is closed is to be prevented by providing either an interlock system or by audible and visual alarms.

11 Hose Stations

11.1 Number Hose stations are to be provided at each side of the vessel, in accordance with 5-9-1/Table 1.

11.3 Stations Each hose station nozzle is to be able to produce a jet or spray. Hoses are to be not less than 38 mm (1.5 in.) nor more than 65 mm (2.5 in.) in diameter, and generally are to be 15 m (49 ft) in length. A water jet flow of at least 12 m (39 ft) is to be provided.

Part 5 Specialized Vessels and Services Chapter 9 Fire Fighting Vessels Section 4 Fire Fighting Systems 5-9-4


11.5 Location At least half of the required number of hose connections required by 5-9-1/Table 1 are to be located on the main weather deck.

13 Foam Generators (FFV Class 2 or 3) FFV Class 2 or 3 are to have 100 m3/minute (3530 ft3/min) minimum capacity mobile high expansion foam generators for fire fighting. On FFV Class 3, this foam generator requirement is in addition to the fixed foam monitor system requirement in 5-9-4/15. Total foam forming liquid carried is to be capable of a least 30 minutes foam production.

15 Foam Monitor System (FFV Class 3)

15.1 Capacity FFV Class 3 are to have two fixed low expansion foam monitors in addition to the required water monitors. Each foam monitor is to have a minimum capacity of 5000 liters/minute (177 ft3/min) with a foam expansion ratio of 15 to 1, and is to be capable of a height of throw 50 m (164 ft) above sea level with both foam monitors in simultaneous use at maximum foam generation. The foam concentration tank is to have a minimum capacity for 30 minutes at an assumed admixture of 5 percent.

15.3 Arrangements The foam monitor system is to be of a fixed design with separate foam concentration tank, foam mixing unit and pipelines to the foam monitors. The water supply may be taken from the water monitor pumps. Means to reduce supply water pressure may be required to assure correct water pressure for maximum foam generation.

15.5 Control The fixed foam monitors are to have both local (manual) and remote control. The remote control of the foam monitors is to be located at the remote-control station for the water monitors and is to include remote control of water and foam concentrate.


P A R T S e c t i o n 5 : F i x e d W a t e r - s p r a y S y s t e m


S E C T I O N 5 Fixed Water-spray System

1 General (2009) FFV Class 1 are to be provided with a permanently installed water-spray system. The water-spray system is to provide protection for all outside vertical/exposed deck areas of the hull, superstructure and deckhouses, including water monitor foundations and equipment associated with the water monitors. The water-spray systems piping, valves and nozzles are to be suitably protected from damage during fire fighting operations.

3 Water-spray System Capacity (2007) The minimum capacity of the water-spray system is to be in accordance with 5-9-5/Table 1 for the total protected area. See also 5-9-7/1. Necessary visibility of water-spray operations from the navigating bridge and from the monitors remote-control station is to be provided.

For vessels which are fitted with a dynamic positioning system which is at least capable of automatically maintaining the position and heading of the vessel under specified maximum environmental conditions having an independent centralized manual position control with automatic heading control, the minimum capacity of the water spray system may be based on the maximum areas which may be exposed to the fire, provided the water-spray system is divided into zones so that those areas which are not exposed to radiant heat can be isolated. The controls are to be located in a dedicated, readily accessible and safe location.

TABLE 1 Minimum Requirements for Water Capacity (2007)

Location to be Protected Minimum Water Capacity liters/minute/m2 (gpm/ft2)

Un-insulated steel (vertical areas) 10 (0.25) Un-insulated steel (horizontal areas) 5 (0.12) Wood sheathed steel decks 10 (0.25) Steel boundaries internally insulated to Class A-60 (1) 5 (0.12)

Note: 1 Applicable for outside vertical areas only. No requirements for exposed deck insulated by A-60.

5 Spray System Pumps Spray system pumping capacity is to be sufficient to insure a supply pressure and volume for adequate operation of the water-spray system. If the water monitor pumps are used, they are to be provided with sufficient capacity to provide pressure and volume for both the water monitors and the water-spray systems.

7 Maintenance Water-spray systems are to be protected from corrosion. Drainage arrangements are to be provided to protect against freezing water damage. Deck scuppers and freeing ports are to be provided to assure efficient drainage of water from deck surfaces when the water-spray system is in operation.


P A R T S e c t i o n 6 : S p e c i a l E q u i p m e n t


S E C T I O N 6 Special Equipment

1 Firemans Outfit

1.1 Number (2009) FFV Class 1, Class 2 and Class 3 are to have the minimum number of firemans outfits indicated in 5-9-1/Table 1. These firemans outfits are in addition to those required in 4-5-2/15 of the Rules.

1.3 Components Firemans outfits are to include the following:

A self-contained breathing apparatus capable of functioning for at least 30 minutes and having a capacity of at least 1200 liters (42 ft3) of free air. At least one set of fully charged spare air bottles of at least equivalent capacity is to be provided for each apparatus.

An electric hand lantern capable of at least three hours continuous operation. Protective helmet, boots and gloves composed of an electrically resistant substance. Water-resistant, protective clothing to protect skin from heat radiation, fire and from burns and scalding

by steam.

A fireproof lifeline, with lifeline belt or harness, attached by means of a snap hook. The lifeline is to be certified by the manufacturer as being of a strength suitable for the service intended, with a length suitable for the range of operations intended.

Information on the firemans outfit is to be displayed at a storage area for the user. Data is also to be included in the operating booklet, which is to be accessible for the crews information. The information to be displayed and operating booklet data are to include particulars on capability of lifelines (holding capacity and length), lanterns (operating time) and breathing apparatus (time).

3 Searchlights

3.1 Number Two searchlights are to be provided on all fire fighting vessels to facilitate effective fire fighting operations at night.

3.3 Range The searchlights are to be capable of providing an effective horizontal and vertical range of coverage and are to provide an illumination to a distance of 250 m (820 ft) in clear air at a minimum level of illumination of 50 lux within an area not less than 11 m (36 ft) diameter.

5 Recharging Equipment An air compressor capable of recharging the air bottles used in breathing apparatus required in 5-9-1/Table 1 is to be provided, and be capable of recharging all of the air bottles of the firemans outfit (breathing apparatus) required in 5-9-1/Table 1 in a time not exceeding 30 minutes. The compressor is to be certified by the manufacturer as being capable of maintaining air purity suitable for this type of service.

Part 5 Specialized Vessels and Services Chapter 9 Fire Fighting Vessels Section 6 Special Equipment 5-9-6


7 Fire Fighting Equipment Components The special fire fighting equipment associated with these requirements is to be in conformance with applicable parts of Part 4, Chapter 5.

9 Equipment Certification Specialized fire fighting equipment, such as monitors, hoses, nozzles, firemans outfits and air bottle charging air compressors, are subject to being documented by the manufacturer as being suitable for the fire fighting service intended. Equipment certification data is to correspond to data given in the operating booklet. See also 5-9-2/5.


P A R T S e c t i o n 7 : S t r u c t u r a l F i r e P r o t e c t i o n


S E C T I O N 7 Structural Fire Protection

1 Exterior Boundaries

1.1 FFV Class 1 All exterior boundaries of FFV Class 1, including exposed bulkheads, exposed decks and the hull above the lightest operating waterline, are to be of steel construction and protected by a fixed water-spray system, in accordance with Section 5-9-5.

1.3 FFV Class 2 and FFV Class 3 Generally, all exterior boundaries of FFV Class 2 and FFV Class 3 are to be of steel but need not be protected by a fixed water-spray system nor internally insulated.

Special consideration will be given to boundaries to be constructed of materials other than steel. Details of the materials and of the protection which may be required to be provided are to be submitted to ABS.

3 Deadlights or Shutters On FFV Class 2 and Class 3 which are not provided with water-spray systems, steel deadlights or shutters are to be provided on all windows and port lights, except in the navigation bridge.

5 Administration In addition, fire fighting vessels are to comply with all requirements for structural fire protection which may be imposed by the Administration of the vessels country of registry.


P A R T S e c t i o n 8 : S u r v e y s


S E C T I O N 8 Surveys

1 General To assist in surveys, the vessel is to be provided with an operating booklet onboard, accessible to the Surveyor, giving detailed descriptions of the fire fighting systems, systems control and operational instructions for the vessel during fire fighting operations, with the location, number and capacity of fire fighting equipment listed. Details of periodic tests, surveys and maintenance of fire fighting installations and equipment are to be provided. See also 5-9-2/5.

3 Tests and Surveys

3.1 Surveys During Construction Operation of completed fire fighting systems is to be demonstrated to the satisfaction of the Surveyor, including height and throw of the water monitors. The angle of list of the vessel with all water monitors at maximum capacity of operation is to be measured and recorded. The operating booklet is to be made accessible for the Surveyors information.


P A R T A p p e n d i x 1 : I n t a c t S t a b i l i t y G u i d e l i n e s f o r F i r e F i g h t i n g V e s s e l s


A P P E N D I X 1 Intact Stability Guidelines for Fire Fighting Vessels (2008)

1 General The intact stability of each fire fighting vessel is to be evaluated for the loading conditions indicated in 5-9-A1/7 for compliance with the intact stability criteria in Section 5-9-A1/5, and the results are to be submitted.

For every loading condition, which is to be shown in the Trim and Stability Booklet, the righting arm curve (GZ curve) should be plotted using the VCG corrected for the free surface effects of liquid in tanks.

3 Submission of Plans The following drawings are to be submitted with the Trim and Stability Booklet for our review:

i) General arrangement plan

ii) Tank Capacity plan or table with centers of gravity and Free Surface Corrections

iii) Lines plan

iv) Hydrostatic curve or table

v) Cross curves of stability

vi) Downflooding angle versus draft curve. The downflooding angle is the first of the angle of heel at which openings in the hull, superstructures or deck houses which cannot be closed weathertight immerse.

vii) Lightship particulars estimated or actual

5 Intact Stability Criteria The following stability criteria are to be complied with:

5.1 General Criteria Chapter 3, Section 3.1 and Section 3.2 of IMO A18/Res.749 are to be complied with generally. If compliance with the dynamic criteria of Chapter 3 Section 3.1.2 of IMO A18/Res.749 is impracticable, equivalent criteria as indicated in Chapter 4 Section 4.5.6 may be used.

5.3 Fire Fighting Operations Each vessel is to have adequate stability for all fire fighting operating conditions, with all fire fighting monitors operating at maximum output in the direction most unfavorable to the stability of the vessel.

Alternatively, consideration will be given to written confirmation of compliance for all fire fighting operations with the stability requirements of the appropriate national administration.

Part 5 Specialized Vessels and Services Chapter 9 Fire Fighting Vessels Appendix 1 Intact Stability Guidelines for Fire Fighting Vessels 5-9-A1


The heeling moment due to the operation of all fire fighting monitors and thrusters is to be converted to a heeling arm, and superimposed on the righting arm curve of the worst operating condition, (usually the port arrival condition). The area of the residual stability (area between the righting arm and heeling arm curves to the right of the first intercept) up to an angle of heel 40 beyond the angle of the first intercept; or the angle of downflooding if this angle is less than 40 beyond the angle of the first intercept, should not be less than 0.09 meter-radians. Additionally, the area of residual stability up to the angle of downflooding or angle of deck edge immersion, whichever occurs first, should not be less than 0.03 meter-radians.

See Reference 5-9-A1/Figures 1 and 2.

FIGURE 1 Heeling Moments Fire Fighting Operations

VCBThrusters

CD

MonitorsA

B

Heeling Moment = Moments A-D

CL

FIGURE 2 Righting Arm and Heeling Arm Curves

0 10 20 30 40 50 60 70 80

40

0.25

0.50

1.00

Heeling Arm

Heeling AngleDeck Edge Immersion

DownfloodingAngle

Righting ArmCurve

Angle of Heel ()(degrees)

HeelingArm (HZ)

RightingArm (GZ)

Area 0.09 meter-radiansArea 0.03 meter-radians

Part 5 Specialized Vessels and Services Chapter 9 Fire Fighting Vessels Appendix 1 Intact Stability Guidelines for Fire Fighting Vessels 5-9-A1


7 Standard Loading Conditions

7.1 Loading Conditions The following conditions of loading are to be examined in the Trim and Stability Booklet:

i) Vessel with full stores and fuel;

ii) Vessel with 10 percent stores and fuel remaining;

iii) Any other normal conditions, both departure and arrival that the Owner feels are appropriate or more suitable to the vessels operation.

7.3 Load Considerations The following are the assumptions for calculating loading conditions:

i) In Loading Condition 5-9-A1/7.1i) above, it should be assumed that the vessel is loaded to its assigned load line with water ballast tanks empty.

ii) If any loading condition water ballast is necessary, additional diagrams should be calculated, taking into account the water ballast. Its quantity and disposition should be stated.

iii) In calculating the free surface corrections, it should be assumed that for each type of liquid, at least one transverse pair or a single centerline tank has a free surface and the tank or combination of tanks that is to be taken into account should be those where the effect of free surface is the greatest.

9 Trim and Stability Booklet The Master of the vessel should receive information in the Trim and Stability Booklet regarding ballasting, fire fighting, etc., to ensure that the stability is in compliance with the criteria given in 5-9-A1/5.

The Trim and Stability Booklet should also contain a table giving the free surface moments for all tanks designed for liquid. If any set of tanks are cross-connected, the free surface moment shall be calculated about the vessels centerline.

Chapter 2 of IMO A18/Res.749 may be used as guidance for information to be provided in the trim and stability booklet.


P A R T Chapter 10: Vessels Intended for Support Services to Offshore Installations

5 C H A P T E R 10 Vessels Intended for Support Services to

Offshore Installations

CONTENTS SECTION 1 General .................................................................................................. 36

1 Application.........................................................................................36 3 Classification.....................................................................................36 5 Submission of Data...........................................................................36 7 Definitions .........................................................................................37

7.1 Offshore Support Vessel................................................................37 7.3 Offshore Installation.......................................................................37 7.5 Cargo Rail......................................................................................37 7.7 Stern Roller....................................................................................37

SECTION 2 Stability ................................................................................................. 38

1 Intact Stability....................................................................................38 3 Subdivision and Damage Stability ....................................................38

SECTION 3 Vessel Design ....................................................................................... 39

1 Side Shell and Frames......................................................................39 1.1 Arrangement of Fender..................................................................39 1.3 Material of Fender..........................................................................39 1.5 Reinforcement ...............................................................................39

3 Cargo Deck .......................................................................................39 3.1 Reinforcement Against Heavy Cargoes .........................................39 3.3 Deck Covering ...............................................................................39 3.5 Cargo Rail......................................................................................40

5 Liquid Cargo Tank.............................................................................40 5.1 Integral Tanks ................................................................................40 5.3 Independent Tanks ........................................................................40

7 Dry Cargo Tanks...............................................................................41 9 Deckhouses ......................................................................................41

SECTION 4 Anchor Handling .................................................................................. 42

1 Winch and Accessories.....................................................................42 3 A-frame or Shear Leg Type Crane....................................................42 5 Stern Roller .......................................................................................42


SECTION 5 Well Stimulation ................................................................................... 43 1 Classification.....................................................................................43 3 Acid Spill Protection ..........................................................................43

3.1 Protection of Floors and Decks .....................................................43 3.3 Shield ............................................................................................43 3.5 Drip Trays and Drainage Arrangements ........................................ 43 3.7 Spill Coaming ................................................................................43

5 Electrical Equipment .........................................................................43 7 Subdivision and Damage Stability ....................................................43

SECTION 6 Carriage of Limited Amounts of Hazardous and Noxious Liquid

Substances ........................................................................................... 44 APPENDIX 1 Intact Stability Guidelines for Offshore Support Vessels................. 45 APPENDIX 2 Damage Stability Guidelines for Offshore Support Vessels ............ 47






1 Application The requirements in this section apply to vessels intended for offshore support services.

3 Classification (1999) In accordance with 1-1-3/3 of the ABS Rules for Conditions of Classification (Part 1), the classification A1 Offshore Support Vessel is to be assigned to vessels designed for support service to offshore installations and built to the applicable requirements of this section and other relevant sections of these Rules. At the request of the Owner, vessels having functional equipment as required below may be assigned an additional notation, as follows:

Additional Notation Services Requirements AH Anchor Handling Section 5-10-4 WS Well Stimulation Section 5-10-5

Such vessels, when built to the requirements of the Rules including those for optional additional notation, will be distinguished as AH/Offshore Support Vessel, WS/Offshore Support Vessel, etc. in the Record.

5 Submission of Data In general, in addition to the plans listed in 1-1-4/1 of the Supplement to the ABS Rules for Conditions of Classification (Part 1) and 4-1-1/7 of these Rules, the following plans and particulars are to be submitted.

Structural details and arrangements of the structures in way of the independent tanks, (dry/liquid mud and/or cement), out-rigger supports for anchor handling gear and/or well maintenance, cargo rail support, whichever is applicable.

Loading arrangement of deck cargoes. Lashing arrangement of deck cargoes. Stability data and calculations. Piping diagrams of liquid cargo transfer systems. Piping diagrams of solid bulk cargo transfer systems. Ventilation diagrams of liquid cargoes.

Part 5 Specialized Vessels and Services Chapter 10 Vessels Intended for Support Services to Offshore Installations Section 1 General 5-10-1


7 Definitions

7.1 Offshore Support Vessel An Offshore Support Vessel is a vessel which is primarily engaged in the transport of stores, materials and equipment to offshore installations and is designed with accommodation and bridge erections in the forward part of the vessel and an exposed cargo deck in the after part for handling of cargo at sea.

7.3 Offshore Installation An Offshore Installation is a marine structure located at an offshore site.

7.5 Cargo Rail A Cargo Rail is a side rail with stanchions supporting lateral and/or lashing loads of deck cargo.

7.7 Stern Roller A Stern Roller is a built-in roller normally installed in way of the intersection of exposed deck and transom for transmission of hook load to crane jib or winch.


P A R T S e c t i o n 2 : S t a b i l i t y



S E C T I O N 2 Stability

1 Intact Stability The intact stability of the vessel for offshore support service to offshore installations is to comply with a recognized standard. The submission of evidence showing approval by an Administration will be acceptable. Alternatively, upon request, the review will be performed by ABS. See Appendix 5-10-A1 for criteria applied by ABS.

3 Subdivision and Damage Stability The subdivision and damage stability of the vessel for offshore support service to offshore installations are to comply with a recognized standard. The submission of evidence showing approval by an Administration will be acceptable. Alternatively, upon request, the review will be performed by ABS. See Appendix 5-10-A2 for criteria applied by ABS.


P A R T S e c t i o n 3 : V e s s e l D e s i g n



S E C T I O N 3 Vessel Design

1 Side Shell and Frames Special attention is to be paid in design for reinforcement of side shell frames to the impact loads arising from contact with offshore installations during operations at an offshore site. The scantlings of main frames or tween deck frames in way of fenders and side shell plate in the area of impact load are to be effectively increased to the anticipated impact load. Unless a specific assessment of impact load is made, at least a 25% increase in scantlings is recommended. See also 3-2-5/9 and 3-2-2/5.3.

1.1 Arrangement of Fender Unless the shell plate at upper deck and forecastle are specifically assessed or otherwise increased for impact loads, longitudinal fenders are normally to be fitted on side shell in the area where the deck has its full breadth.

1.3 Material of Fender Material of the fender is to be steel having ductility and weldability not less than that required for Grade A material.

1.5 Reinforcement Carling plates are to be so arranged between side frames that fender loads are distributed to the hull.

3 Cargo Deck

3.1 Reinforcement Against Heavy Cargoes Where heavy cargo is carried on deck, effective means such as steel cradle or steel or wooden dunnage are to be provided so that cargo weight is uniformly distributed in the deck structures. The stresses in deck members are not to exceed the following values when the maximum bending moment is applied. In determining the maximum bending moment, members may be considered fixed-ended provided they are continuous over the adjacent space or are effectively attached to a bulkhead stiffener or frame.

tf/cm2(ltf/in2)

tf/cm2(ltf/in2)

Longitudinal Beam/Girder: Transverse Beam/Web:

1.26 (8.0) 1.42 (9.0)

0.70 (4.4) 0.87 (5.5)

3.3

abs rules for building & classing steel vessels under 90m in length part5 2006

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