SEATTLE, Washington – The American Bureau of Shipping has given “approval in principle” to the Jensen Maritime LNG bunkering articulated tug-barge design.
The design is oceans rated said Jensen Marine, and can serve to transfer and use LNG in areas of limited infrastructure.
The design calls for four 1,000 cu m (35,315 cu ft) Type C LNG tanks. The barge measures 360 ft x 60 ft x 35 ft (110 m x 18 m x 11 m) with a combined tug-and-barge length of 452 ft (138 m).
The tug (under 500 GT US regulatory) features two GE 6L250 engines (Tier 3), each offering at least 2,035 hp, and two Rolls Royce 205 Z-drives, with a speed of 12 knots. The ATB will carry 30,800 gal of fresh water and 90,100 gal (341,066 l) of ballast water, plus space for 12 crew members. It is double hulled to help protect its 4,000-gal (15,142-l) fuel tank.
Jensen Maritime added that the vessel has firefighting capabilities. Classed as a firefighting vessel (FFV-1), it is equipped to handle emergencies on board and can satisfy most requirements to have at least one FFV-classed tug escorting LNG tankers into port. Finally, because there is no linkage between the tug and barge, the two can disconnect quickly in the event of emergency.
Expected time to build the ATB is between 18 to 30 months.