Page 72: of Maritime Reporter Magazine (December 1997)

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Maritime Reporter Magazine, page 71, Dec 1997

Maritime Reporter Magazine, page 72, Dec 1997

Maritime Reporter Magazine, page 73, Dec 1997

JAPANESE MARITIME REVIEW

Japan's first jetfoil service, and today it operates a fleet of five diesel ferries and five jetfoils.

The company's high-speed, reli- able service has been so effective that in 1996, its only competition — an airline — stopped flying to

Sado Island. That year, Sado

Kisen vessels carried 650,000 peo- ple, most of them tourists.

Sado Kisen's jetfoils, built by

Boeing Corp., are powered by avia- tion-type Allison gas turbines. The units create a waterjet system (Continued from previous page) handle the offloading hose.

The cargo tank of the FSO is designed by the Leak Before

Failure (LBF) concept in conformi- ty with the self-supporting tank type B in IMO Gas Code. In fatigue design of the type B tank, the builder insisted that the actual structural construction tolerance be better than the tolerance assumed in the design.

Although the hull structure is not subjected to the type B by IMO Gas

Code, it was evaluated in order to ensure reliability equivalent to that of the cargo tank.

Principal Particulars

Length, o.a 565 ft. (172.1 m)

Length, b.p 466.2 ft. (142.1 m)

Breadth, molded 118.1 ft. (36 m)

Design draft, molded 77 ft. (23.4 m)

DWT 37,354

GT 40,681

Cargo tank IHISPB system (3)

Accommodation 50

Diesel generator 1,750 kW (4)

LPG refrigeration plant, R22 cascade type 1,885 kW (2), 920 kW (2)

Reliquification plant, direct type 1,897 cu. m./hr. (3)

Cargo pump, deep-well type —530 cu. m./hr, (6)

Inert gas generator 3,600 cu. m./hr.

Loading capacity 1,075 cu. m./d (normal) 3,180 cu. m./d (maximum)

Pictured is the FEM analysis model of hull and tank (top external, bottom internal view). that, according to Boeing, helps to decouple the vessel ^^^ from surface water, providing a smooth ride even in heavy seas.

With foils extended, the vessels cruise at approximately 43 knots.

The propulsion system operates on a waterjet principle, using pumps to discharge water at high pressures through nozzles ^^^ directed aft. Each vessel has two pumps which deliver 24,000 gallons per minute. Each pump is powered by a gas turbine system.

According to Sado Kisen engi- neers, the most critical challenge for a jetfoil engine lubrication sys-

Organised by:

Seatrade

Miller Freeman Japan Co. Ltd