Second Azimuth Stern Drive tug for Sause Bros.

Thursday, July 29, 1999
Designed and built by Southern Oregon Marine (SOMAR) Shipyard, in Coos Bay, Ore., new Azimuth stern drive (ASD) tug Tira Lani was recently delivered to Sause Bros. The tug will join ASD Kamaehu and Pono for duty, assisting ships arriving and departing Honolulu Harbor and their own barge movements in the harbor. Tira Lani is the first tugboat constructed from the keel up by SOMAR. The vessel is powered by twin Caterpillar Model 3516B electronic controlled propulsion engines rated at 2,100 hp @ 1,600 rpm, driving through Ulstein Model 1650 Azimuth stern drives with 86 in. diameter propellers in nozzles. The propulsion system gives a service speed of 13 knots, a bollard pull astern of more than 100,000 lbs., and a bollard pull ahead of 120,000 lbs. Electric power and power for the bow winch is provided by two Northern Lights Model M 80C.2S, 80 kW and 480-volt generators. Another distinguishing feature of the tug is the structural steel frame work, designed to both support the exhuast pipes, while offering a simple structure to protect the house, should the tug take a sudden roll while operating in tight quarters alongside a ship keeping the stacks above the pilot house.
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