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USCGC Katmai Bay (WTGB-101)
USCGC Katmai Bay (WTGB-101)
Career (USA) Ensign of the United States Coast Guard.svg
Commissioned: 8 January 1979[1]
Homeport: Sault Ste. Marie, Michigan
General characteristics
Class & type: 140' Bay-class Icebreaking Tug (WTGB)
Length: 140 ft (43 m)[1]
Beam: 37 ft 6 in (11.43 m)[1]
Draft: 12 ft (3.7 m)[1]
Installed power: 2 × 2,500 shp (1,900 kW) diesel engines
2 × 125 kW generators
Propulsion: Electric motor driven main propulsion shaft[1]
Speed: 14.7 knots (27.2 km/h; 16.9 mph)[1]
Range: 7,413 km (4,606 mi)[1]

USCGC Katmai Bay (WTGB-101) is a United States Coast Guard Cutter and icebreaking tug.


Katmai Bay, namesake of an area of saltwater shoreline in the Katmai National Park and Preserve of Alaska, is the lead ship of a class of icebreaking tugboats designed to have greater multi-mission capabilities than the 110' Calumet-class Harbor Tug (WYTM). The most significant differences include greater horsepower, greater speed, longer range, increased ice-breaking capability, hull lubrication system, greater degree of automation, and better habitability.[1]

Trials were conducted in Whitefish Bay, Lake Superior, Michigan which determined that the ship has a tactical diameter of approximately three ship lengths when using 30 degrees rudder and that the ship could stop in 40 seconds with a reach of four ship lengths from an approach speed of 12.8 knots (23.7 km/h; 14.7 mph) when ordering full astern power. The ship can obtain a speed of 14.7 knots (27.2 km/h; 16.9 mph).[1]

Cgc Katmai Bay sm

Katmai Bay breaking ice


Katmai Bay is, as of 2012, stationed at Sault Ste. Marie, Michigan.[2] She is helping the USCGC Mackinaw (WLBB-30) in ice breaking duties.[citation needed]


  1. 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Hunt, Robert R.; Hundley, Lowry L. (1979). "Katmai Bay (WTGB-101) Speed, Tactical, and Maneuvering Trials". David W Taylor Naval Ship Research And Development Center. Retrieved 10 March 2009. 
  2. "USCGCGC Katmai Bay (WTGB 101)". United States Coast Guard. 26 January 2012. 

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