managing dynamic positioning (dp) operations...structures (imca m202) •guidance on simultaneous...
TRANSCRIPT
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© IMCA 2017
Managing Dynamic Positioning (DP) Operations
Captain Andy Goldsmith, IMCA Technical Adviser
IOSH Offshore Conference – Tools for the trade
19 October 2017
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IMCA OPERATIONAL STRUCTURE
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BOARD
CEO
OPERATIONS COMMITTEE
SECRETARIAT
CORE
COMMITTEES
• HSSE(Health, Safety, Security
& Environment)
• Contracts & Insurance
• Competence &
Training
• Lifting & Rigging
• Marine Policy &
Regulatory Affairs
DIVISION
COMMITTEES
• Diving
• Marine
• Offshore Survey
• Remote Systems
& ROV
REGIONAL
COMMITTEES
• Asia-Pacific
• Europe & Africa
• Middle East & India
• North America
• South America
TECHNOLOGY
COMMITTEES
• To be established:
but now IMCA has the
structure in place if it
needs to add these
in future
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• Maximum 12 members
• At least 50% contractor companies
• At least 1 DP consultant company
• At least 1 equipment supplier
• At least 1 DP training establishment
IMCA MARINE DP COMMITTEE
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MEMBERSHIP
• Copy recipients
− Interested individuals
− Receive committee updates
− Currently 18 companies
represented
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• Review & revise existing DP guidance
• Produce new DP guidance if required
IMCA MARINE DP COMMITTEE
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FUNCTION & OBJECTIVES
• Provide industry with DP
related lessons learnt
• Advise on the IMCA DP reporting scheme
• Promote DP station keeping reporting
• Represent IMCA at DP related forums
• Contribute to IMCA DP workshops
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• DP station keeping event annual
summary spreadsheet
• Quarterly DP event Bulletin
introduced
IMCA MARINE DP COMMITTEE
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ACHIEVEMENTS
More than 20 DP related documents reviewed and revised during 2016
Document revision programme established
Successful DP station keeping workshop held in Amsterdam June 2016
• A new interactive DP event
reporting form introduced
• Timely production of the annual
DP event review
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• IMCA and the Marine DP Committee
• Maintaining position
• Elements of the DP system
• Regulatory requirements
• Operational activity planning
• Defining the operational mode
• Activity Specific Operational Guidance (ASOG)
• Available guidance
AGENDA
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• Manual thruster control
• Joystick control
• Automatic DP
• 4 Point Moor
• DP Mooring assist
• Self-elevating vessels
MANAGING DP OPERATIONS
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MAINTAINING POSITION
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Consists of three sub-systems
• Power system
• Thruster/propulsion system
• DP control system
− Heading sensor
− Wind sensor
− Motion sensor
− Position reference
systems
• Some say four!
− The DP Operator
− Key DP Personnel
MANAGING DP OPERATIONS
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ELEMENTS OF A DP SYSTEM
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IMO MSC Circular 1580 Guidelines for Vessels and Units with Dynamic
Positioning (DP) Systems
MANAGING DP OPERATIONS
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REGULATORY REQUIREMENTS
• Section 4 Operations
− Use decision support tools
− DP System functioning
correctly
− Location checklists
− Set up for the appropriate
mode of operation
− Activity Specific Operational
Guidelines
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Guidance on Operational Activity Planning (IMCA M220)
MANAGING DP OPERATIONS
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IMCA GUIDANCE
Operational activity planning addresses the
following:
1. defines the appropriate
configuration for the location and
vessel activity
2. defines limits for equipment and
operational parameters for the
location and activity
3. defines actions to be taken by key
vessel personnel
4. presents operational guidance in
an easy to understand decision
support tool
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Requires a thorough knowledge of:
• the DP system
• the DP FMEA
• the industrial mission
• vessel location
• risk assessments
MANAGING DP OPERATIONS
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OPERATIONAL ACTIVITY PLANNING
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Critical Activity Mode (CAM)
• Vessel meets maximum level of redundancy
• No single failure will exceed the identified worst case failure
− Defines the most robust configuration
− Identifies equipment required
− Methods of operation
MANAGING DP OPERATIONS
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DEFINING THE OPERATIONAL MODE
Should be used for all critical activities
Generally, a vessel only has one CAM
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Task Appropriate Mode (TAM)
• Risk based dependant on vessel operation
• A single failure could result in worst case failure
MANAGING DP OPERATIONS
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DEFINING THE OPERATIONAL MODE
Operation is not so critical and redundancy is not essential
A vessel may have several task appropriate modes
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MANAGING DP OPERATIONS
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WHEN MIGHT YOU WORK IN TAM?
Where the time to terminate operations is short rather than long:
• DP MODU on standby or not connected to the seabed
• DP PSV delivering targets to a platform prior to operations beginning
Working in open water:
• DP construction vessel on the leeside and more than 500 m from a surface or
mission critical subsea asset
• A diesel electric subsea support vessel may operate with closed main
switchboard bus tie breakers, as opposed to open bus tie breakers when
performing open water subsea activities and the consequences of loss of
position and or heading are acceptable.
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• Green
− Normal operations
• Blue
− Advisory status
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ACTIVITY SPECIFIC OPERATIONAL GUIDANCE
• Yellow
− Degraded status
• Red
− Emergency status
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MANAGING DP OPERATIONS
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ACTIVITY SPECIFIC OPERATIONAL GUIDANCE
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VIDEOINFIELD PERSONNEL TRANSFER
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Valuable in field guidance
• Guidance on operational activity planning (IMCA M220)
• A guide to DP-related documentation for DP vessels (IMCA M109)
• Guidance on the transfer of personnel to and from offshore vessels and
structures (IMCA M202)
• Guidance on simultaneous operations (SIMOPS) (IMCA M203)
• Guidance on operational communications (IMCA M205)
Core IMCA DP guidance documents
• Guidelines for the design and operation of dynamically positioned vessels
(IMCA M103)
• The training and experience of key DP personnel (IMCA M117)
• Guidance on failure mode and effects analysis (IMCA M166)
• Guidance for developing and conducting DP annual trials programmes
(IMCA M190)
MANAGING DP OPERATIONS
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AVAILABLE GUIDANCE
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© IMCA 2017
www.imca-int.com
Improving performance in the
marine contracting industry
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