Bay-class icebreaking tug

The USCG Bay-class icebreaking tug is a class of 140 ft 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 in thick, and break ice up to 3 ft thick, through ramming. These vessels are equipped with a system to lubricate their progress through the ice, by bubbling air through the hull.

Ships

 * (WTGB-101) Katmai Bay (Home Port - Sault Ste. Marie, MI)
 * (WTGB-102) Bristol Bay (Home Port - Detroit, MI)
 * (WTGB-103) Mobile Bay (Home Port - Sturgeon Bay, WI)
 * (WTGB-104) Biscayne Bay (Home Port - St. Ignace, MI)
 * (WTGB-105) Neah Bay (Home Port - Cleveland, OH)
 * (WTGB-106) Morro Bay (Home Port - New London, CT)
 * (WTGB-107) Penobscot Bay (Home Port - Bayonne, NJ)
 * (WTGB-108) Thunder Bay (Home Port - Rockland, ME)
 * (WTGB-109) Sturgeon Bay (Home Port - Bayonne, NJ)
 * (WTGB-110) Curtis Bay (Construction cancelled)