Crowley orders two ocean tugs from Bollinger

23 Feb 2010

Graphical rendering of Crowley's new Ocean class tugs

The US tug owner Crowley has signed a contract with Bollinger Shipyards to build two newly designed ocean going tug with options for additional vessels.

These 8,113kW tugs are the beginning of a newbuild programme at Crowley to further enhance its ocean towing, salvage and offshore support capabilities. The newbuildings will be ideally suited to work with Crowley’s new 455 series heavy lift deck barges, which measure 122m x 32m. Additionally, the tugs will be outfitted for, and capable of, rig moves, platform and FPSO tows, emergency response and firefighting.

Crowley subsidiary Jensen Maritime Consultants played a key role assisting Crowley’s Ed Schlueter and a cross functional team in the design of this new class of vessel. The new Ocean-class tugs will be 44.5m long, 13.4m wide and have a draught of 6.4m and are to be named Ocean Wave and Ocean Wind. They will be constructed at Bollinger Marine Fabricators in Amelia, Louisiana, with deliveries scheduled for the third quarter of 2011 and the first quarter of 2012 respectively. Designed to have a minimum bollard pull of 150 tonnes, the operational range for the vessels will be approximately 12,600 nautical miles at 15 knots free running.

The vessels, to be outfitted for long-range, high-capacity, ocean towing, are designed with personnel safety as a priority. The waterfall style winch, shark jaws and retractable pins can all be controlled from the pilothouse, keeping the deck clear of personnel and creating a safer working environment.

Powered by EPA Tier II compliant Caterpillar main engines and generators, the new tugs will be fitted with two controllable-pitch propellers in nozzles and high lift rudders for a combination of performance and fuel economy. During construction the vessel will be documented and receive a Green Passport Certification. Further environmental protection is provided by the tugs’ double-hulls and all tanks containing liquids are inboard of the side shell.

The tugs will meet all SOLAS and ABS criteria, and including ABS Fi-Fi 1 firefighting standards. Additionally, the Ocean class vessels will have the capability to support salvage and rescue towing opportunities, as well as the U.S. Navy’s SUPSALV contract.

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