Jensen Maritime Consultants, Crowley Maritime Corp.’s Seattle-based naval architecture and marine engineering company, has provided the detailed design for Shaver Transportation Co.’s new, Z-drive tug — Samantha S.
The multi-purpose tug was built at Diversified Marine Inc., in Portland, Ore., and is operating along the West Coast. The tug is ABS-classed and carries a FFV1 firefighting notation.
The 112'x44' tug has a 22' draft and was built for escort, ocean towing and ship assist, and has firefighting capabilities if needed. The tug features a raised pilothouse and a squared forward end. The large, flat bow allows the tug to come up flat against the transom of ocean-going ships in the Columbia River. The tug is equipped with two wire winches forward, and six aft, for hard wiring to the stern of large ships for escort. It has an enhanced fuel capacity of 108,000 gals. for offshore and rescue tows and accommodations for up to 10 crewmembers.
Samantha S is outfitted with a pair of GE 12V250 U.S. EPA Tier 4, medium-speed diesel main engines; a pair of Rolls Royce 305, 4-bladed Z-drives; a pair of EPA Tier III, John Deere 6090A generators; and one Caterpillar C32 fire pump power plant. The engines are rated at 4,218 hp each and will provide enough power to develop an estimated 230,000 lbs. of bollard pull.
The new tug’s deck machinery consists of the previously listed eight deck winches, all of which are Wintech 120-ton (SWL) winches; one Rapp HA-149H-250 escort winch; and a Rapp double drum AHTW-75H-165 tow winch. The fire pump and the two fire monitors are provided by Fire Fighting Systems U.S. agent, Inmar Systems. The firefighting system has the capability to pump more than 12,000 gpm to fight marine and near shore fires.
“The size and special features of Samantha S demonstrate our ability to provide agile, efficient vessels for a variety of requirements,” Bryan Nichols, Jensen's director, business development, said in a prepared statement. “This tug is the latest multi-purpose escort, ocean towing and assist tugboat to hit the water from our diverse design portfolio which includes all types of workboats from 55-foot push boats to 225-foot anchor-handling tugs.”
Seattle-based Jensen Maritime Consultants is a naval architecture and marine engineering firm owned by Crowley Maritime Corp. The company offers a diverse range of consulting, design and engineering services developed from more than 50 years of experience working around the world. Jensen designs all types of vessels — particularly workboats, fishing boats and fireboats — and has built a favorable reputation on a long history of successful designs and conversions with close attention to engineering basics. The company's services include detail and conceptual design and engineering, lofting, regulatory and shipyard liaison as well as on-site consulting services and on-location assistance anywhere in the world.