Jensen designing two new tugs for Kirby Offshore

The following is the text of a news release from Jensen Maritime Consultants Inc.:

(SEATTLE) ­— Jensen Maritime, Crowley Maritime Corp.’s Seattle-based naval architecture and marine engineering company, was recently selected to provide the ABS class and functional designs for two new 120-foot twin-screw tugboats for Ice Flow LLC, dba Nichols Brothers Boat Builders (NBBB), and Kirby Offshore Marine LLC.

“Jensen is proud to have been chosen as the design firm on this project and looks forward to seeing the vessels through from concept to completion,” said Johan Sperling, vice president, Jensen Maritime. “We will imbed a full-time Jensen designer in the shipyard for the duration of this project to help with system design and to ensure that the tugboats are built to exacting specifications.”

The two 120-foo-long, 35-foot-wide tugboats, which will be used for tow operations, will be powered by two Caterpillar 3516C, 2,447 bhp at 1,600 rpm main engines, with Reintjes reduction gears turning two Nautican fixed-pitch propellers with fixed nozzles. These vessels will also have two C7.1 Caterpillar generators for electrical service, one TESD-34 Markey tow winch, one CEW-60 Markey electric capstan and one Smith Berger tow pin.

Keels will be laid for both vessels this fall with complete vessel delivery scheduled for May and November 2017. Both vessels will be fully classed by ABS and compliant with U.S. Coast Guard, as required at delivery.

About Jensen Maritime

Seattle-based Jensen Maritime Consultants Inc. 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 is a recognized leader in the design of 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. Additional information about Jensen can be found at

By Professional Mariner Staff