Columbia Class Tug for Shaver Transportation

Wednesday, December 29, 2010
Photo courtesy Capilano Maritime Design

Capilano Maritime Design Ltd. has recently completed the design of an 80‐foot Columbia Class ASD Ship‐Docking Tug for Shaver Transportation Company of Portland, Oregon. The tug is currently being built by Diversified Marine Inc., also of Portland, and will be the most powerful in Shaver’s fleet when delivered in 2011. The Columbia Class is a new series of tug designs by Capilano Maritime Design Ltd.

The general arrangement is shown in the attached drawing and the vessel has the following particulars:
Length overall: 80’‐0” (24.4 m)
Breadth, moulded: 36’‐0” (11.0 m)
Depth, moulded: 14’‐4” (4.4 m)
Draft, maximum: 17’‐0” (5.2 m)
Power: 5,360 bhp (4,000 kW)
Bollard Pull: 134,000 lb (60.8 metric tonnes)

Power will be provided by two high‐speed MTV/Detroit Diesel 16V4000 M61 main engines, each rated 2,680 bhp at 1,800 rpm. Each engine drives a Schottel SRP1215 360° azimuthing thruster with 94.5” diameter fixed pitch propeller.

Ship‐docking will be performed by a heavy duty Hawser winch from Markey Machinery, model no. DEPCF‐48, with a 50‐hp electric motor. The winch will be fit with 400 feet of 9” circumference Spectra/Plasma line in 8 layers and will have a brake capacity of 400,000 lbs minimum, at the second layer. The rated pull is 22,150 lbs on the second layer at a speed of 67 feet per minute.

Capilano Maritime Design Ltd. is a naval architecture design firm based in North Vancouver, BC, Canada. Capilano Maritime specializes in the design of commercial workboats including tugs, barges, crew boats, dredges, offshore supply vessels, marine construction vessels and ferries, as well as providing general consulting services to the marine industry

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