sname sd-5 panel and international … dnloads/070627 mtg... · turning coastal oceans into sea...

1

SNAME SD-5 PANEL and INTERNATIONAL HYDROFOIL SOCIETY

A Pentamaran Bridge over the SeaStephen Flott, Chairman - SeaBridge Inc.

Arlington, VA – Wednesday, June 27, 2007

Turning Coastal Oceans into Sea Bridges

22

90

100

110

120

130

140

150

160

170

180

190

200

1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000Year

Ind

ex

Total VMTLane Mile

Truck VMT

Source: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics (Washington, DC: Various years).

“One of the nation’s biggest challenges is closing the gap between the demand for transportation services and infrastructure capacity.”

The Freight Story, pp. 12-13, USDOT, November 2002

Economic Growth

Infrastructure stagnation

Truck VMT

Total VMT

vs


33

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

Air Highw ay Rail Water Air Highw ay Rail Water Other*

Domestic International

1998 2010 2020

U.S. Freight Shipments by Tonnage

Source: The Freight Analysis Framework (FAF), U.S. Department of Transportation

Domestic freight is and will continue to drive the “gap between demand for transportation services and infrastructure capacity”


44

Secretary of Transportation Norman MinetaSpeech at US Chamber of Commerce Conference 6/12/03

“Our landside transportation system is already stressed to the limit and currently planned infrastructure improvements and expansion cannot possibly meet this escalating demand.”

“One intermodal alternative is the development of a robust short sea shipping system that would aid in the reduction of growing freight congestion on our nation’s rail and highway systems.”


55

90

100

110

120

130

140

150

160

170

180

190

200

1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000Year

Ind

ex

Total VMT

Lane Mile

Truck VMT


Waterborne services need to create substantial new freight capacity if the US is to close this gap!


66

90

100

110

120

130

140

150

160

170

180

190

200

1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000Year

Inde

x

Total VMT

Lane Mile

Truck VMT


Absorbing vehicle miles from highways creates capacity without adding lanes


77

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

Air Highw ay Rail Water Air Highw ay Rail Water Other*

Domestic International

1998 2010 2020

Source: The Freight Analysis Framework (FAF), U.S. Department of Transportation

Short sea shipping has to attract hundreds ofthousands of truckloads a year from the road to offer any hope for easing freight congestion


88

The SeaBridge Approach is just one optionCreate a fast, reliable, coastal freight and passenger ferry network with the capacity and scale to improve motor carrier service capabilities and lower costs and offer a new “mini-cruise”option to motorists


99

Value proposition: save time, miles andmoney


1010

ü Faster transit times than existing over-the-road and rail intermodal services

ü Matches team driver operationsü Reduces exposure to accidentsü Improves equipment velocity and utilizationü Improves driver utilization and retentionü Hours of service compliance without loss of

service speedü Expands markets; increases profitability

Advantages of expedited intermodal for truckers


1111

Ship size, speed, fuel efficiency and seakeeping ensure schedule integrity with a high level of passenger comfort

SeaBridge USA’s roll-on/roll-off passenger vessel can transport more than 170 trailers or 100 trailers & 500 cars and 1,800 passengers at up to 42 knots


1212

0

50

100

150

200

250

300

350

15 20 25 30 35 40 45 50 55 60

Speed (knots)

Leng

th (m

)

Fn = 0.2 Fn = 0.3 Fn = 0.4 Fn = 0.5

Fn = 0.6

Fn = 0.8

Fn = 1.0

Afloat Support Vessels20MW Average50% Deadweight FractionLDR = 5.9 (average)

HSLC Monohulls & MultihullsUp to 78 MW25% Deadweight Fraction TypicalLDR = 7-8 typical

SL788MW, 52% DwtLDR = 7.5

SS United States

Frigates40MW Average25% Deadweight FractionLDR = 7.0 (average)

Current HSLC Monohull Size Limit (Steel/Alloy)

Current HSLC Multihull Size Limit (Alloy)

HSLC Limit Monohulls

HSLC Limit Multihulls

Conventional RoRo/RoPax54MW Average35-40% Deadweight FractionLDR = 6.5 typical

SeaBridge

ADX, 106MW, 32% Dwt, LDR = 10.3

RR P2500

RR FNSLV108 MW, 35% Dwt, LDR =8.0

Fast Ship Atlantic250 MW, 53% Dwt, LDR = 6.9

Catamarans

Monohulls

Stabilised Monohulls


1313

SS United States

SL788M W, 52% DwtLD R = 7.5

X-Craft53M W, 25% DwtLD R = 7.0

NGA TSV Proposal

NGA LCS Proposal

F ast Ship At lantic300M W, 33% D wtLD R = 7.6

SeaBridgeADX, 106M W, 32% Dwt, LDR = 10.3

FFBIZAR/RR EHSCV

RR P2500

RR F NSLV108 M W, 35% D wt, LD R =8.0

0

50

100

150

200

250

300

350

15 20 25 30 35 40 45 50 55 60

Speed (knots)

Leng

th (m

)

Fn = 0.2 Fn = 0.3 Fn = 0.4 Fn = 0.5

Fn = 0.6

Fn = 0.7

Fn = 0.8

Fn = 0.9

Fn = 1.0

A float Support Vessels20M W Average50% Deadweight F ractionLDR = 5.9 (average)

Frigates40M W A verage25% D eadweight FractionLDR = 7.6 (average)

C onventional R oRo /Ro P ax54M W Average35-40% Deadweight F ractio n

HSLC M ono hulls & M ultihullsUp to 78 M W25% D eadweight Fraction TypicalLDR = 7 typical

C urrent HSLC M onohull Size Limit (Steel/A lloy)

C urrent HSLC M ultihull Size Limit (Alloy)

H SLC Limit

H SLC Limit

Catamarans

Monohulls

Stabilised Monohulls

Displacement Monohulls

CatamaransMono or Cat

Stabilised Monohull


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• REDUCE SPONSON DRAG

• TORSIONAL STRENGTH PROBLEMS

• MAINTAIN STABILITY

• DOCK SHIP PARALLEL TO QUAY

• DAMAGE STABILITY PROBLEMS

TORSIONAL INPUT TO SHIPSPREAD OVER 2 LOCATIONS

SLENDER SPONSONSFOR LOW DRAG

SHIP MEETS ALL DAMAGEDSTABILITY REGULATIONS, INCLUDINGTOTAL SPONSON LOSS.

AFT SPONSONS ONLY IN WATERIN FULL LOAD UPRIGHT CONDITION

PAIR OF SPONSONS ALLOWPARALLEL MOORING


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Progressive HeelingAft Sponsons Forward Sponsons

Upright - Zero Heel Angle

Small Heel Angle

Larger Heel Angles


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1717


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1919

0.0

2.0

4.0

6.0

8.0

10.0

12.0

14.0

16.0

18.0

20.0

22.0

24.0

25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59

Ship Speed (knots)

Fuel

Cos

t per

Ton

ne o

f Car

go p

er 1

00 n

.m (U

S$/

t/100

n.m

)

Existing Fast Car-Pax Ferries

FAST RO-RO

IZAR NGA Ro-Ro

Fast Car-Pax Ferry Limit


2020

COMPARISON OF SEAKEEPING PERFORMANCE(VESSEL OF APPROX 1000 t DWT)

0,00

0,50

1,00

1,50

2,00

2,50

3,00

3,50

0,0 5,0 10,0 15,0 20,0SHIP SECTION

STA

ND

AR

D D

EVIA

TIO

N O

F VE

RTI

CA

L A

CC

ELER

ATI

ON

(m/s

2)

PENTAMARAN 180ºPENTAMARAN 150ºMONOHULL 180ºMONOHULL 150ºCATAMARAN 150 ºCATAMARAN 150º


2121


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• Structural Development

• Ship Arrangements• Hull Form Development

• Cost & Route Studies


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0.0

0.1

0.2

0.3

0.4

0.5

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0.8

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RA

O P

ITC

H e

ta(5

)/A [d

eg/m

]

W A V E P E RIOD [s ec]

DISPLACEMENTS

0

100

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300

400

500

0 10 20 30 40 50

Ver

tical

ben

ding

mom

ent R

AO

[M

Nm

/m]

W A V E P ERIOD [sec ]

Vertical bending moment at Transverse cut X = 125.00 m


2424

Thank you!

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