This article is about a class of icebreaking tugboats in the United States Coast Guard. For radio station WTGB, see WTGB.
The U.S. Coast Guard Cutter Thunder Bay (WTGB-108) clears a channel for vessels to navigate the frozen Hudson River
Bay class icebreaking tug
Tacoma Boatbuilding Company & Bay City Marine
United States Coast Guard
42.7 m (140 ft)
11.4 m (37 ft 5 in)
3.8 m (12 ft 6 in)
diesel electric: 2 Fairbanks Morse diesel engines with Westinghouse DC generators, 1 Westinghouse DC motor
14.7 knots (27.2 km/h)
1,500 nautical miles (2,800 km) at 14.7 knots (27.2 km/h)
3,500 nautical miles (6,500 km) at 12 knots (22 km/h)
6,000 nautical miles (11,000 km) at 10 knots (19 km/h)
17 (3 officers)
2 × 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.