US-based Baydelta Maritime has selected Crowley Maritime’s Seattle-based naval architecture and marine engineering firm Jensen Maritime to design a new hybrid tractor tugboat.

The 100ft tugboat will be equipped with a Z-Drive system and various Rolls-Royce hybrid technologies, as well as a Nichols Brothers Boat Builders (NBBB) hybrid system.

The ABS Load Line-classed vessel is expected to be delivered by the first quarter of 2019.

Jensen Maritime business development director Bryan Nichols said: “Our work reflects our commitment to innovative, environmentally friendly design combined with powerful, high-quality performance.

"This tug will meet the industry’s demand for strong yet nimble vessels with the quality design that customers expect from Jensen."

“This tug will meet the industry’s demand for strong yet nimble vessels with the quality design that customers expect from Jensen.”

The new tug is slated to include the same ship assist and tanker escort capabilities of the current generation of Valor-class harbour tugs, but with multiple operational modes.

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It will be able to operate under direct-diesel, diesel-electric or fully electric modes using the Rolls-Royce hybrid system in order to assist large containerships and tankers operating ports around the US West Coast.

The Rolls-Royce system also provides the vessel with the flexibility to loiter and transit at up to 7k-8k in electric-only mode, with a bollard pull of 90t, or nine short tonnes, in combined diesel-electric mode.

The tug will be powered by two Caterpillar C3516 C Tier 3 diesel engines and is set to feature two Rolls-Royce 424kw electric motors and two Rolls-Royce 255FP units, among others.

All four of the tugboat’s generators will be supplied by Peterson Power.

Furthermore, the tug will feature eight berths and include a Rapp Marine electric hawser winch, as well as a single-drum tow winch on-board.

The vessel will be equipped with a pilot house and deckhouse, in addition to a mess and lounge area.

It will be able to accommodate up to eight crew members.

The tug will also be able to carry up to 71,000gal of fuel and 4,300gal of fresh water.