USCG Katmai Bay class icebreaking tug

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USCG icebreaking tug Biscayne Bay (WTGB 104)
Class overview
Name:Bay Class Icebreaking Tug
Builders:Tacoma Boatbuilding Company & Bay City Marine
Operators:United States Coast Guard
In commission:1979-Present
General characteristics
Type: Icebreaker
Displacement: 662 tons
Length: 42.7 metres (140 ft)
Beam: 11.4 metres (37 ft 5 in)
Draught: 3.8 metres (12 ft 6 in)
Propulsion: 2 diesel engines
Speed: 14.7 knots (27.2 km/h)
Range: 1,500 nautical miles (2,800 km) at 14.7 knots (27.2 km/h)
4,000 nautical miles (7,400 km) at 12 knots (22 km/h)
700 nautical miles (1,300 km) at 7 knots (13 km/h)
Complement: 17 (3 officers)
Armament: 2 x M240 machine guns

The USCG Bay-class Icebreaking Tug is a class of 140-foot (43 m) icebreaking tugs of the United States Coast Guard, with hull numbers WTGB 101 through to WTGB 109.

They can proceed through fresh water ice up to 20 inches (51 cm) thick, and break ice up to 3 feet (0.91 m) thick, through ramming. These vessels are equipped with a system to lubricate their progress through the ice, by bubbling air through the hull.


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