This is my first posting hope it is ok

U.S. Coast Guard Cutter MOBILE BAY is the third of nine cutters in the Coast
Guard's "Bay" class of icebreaking tugs. She is equipped with the second of two 120
foot aids to navigation (buoys) barges operating on the Great Lakes.

Homeported in Sturgeon Bay, Wisconsin, CGC MOBILE BAY has dual
responsibilities in assisting navigation in the Great Lakes. During the winter
months, the cutter detaches from the barge and breaks ice in the northern Great
Lakes, operating mostly in the straits of Mackinac and the St. Marys River (the
waterway which joins Lakes Superior and Huron).

Acquisition of Coast Guard Barge 12002 has made CGC MOBILE BAY's hectic
schedule even busier. In addition to the duty of icebreaking, the twenty ton capacity
crane and large buoy deck area enable the tug/barge combination to effectively
maintain 119 buoys in northern Lake Michigan.

Given her two primary missions of icebreaking and buoytending and the occasional
additional missions of search and rescue, law enforcement and pollution response,
the hard working CGC MOBILE BAY and her crew dutifully live up to their
motto, "Breaking the Trail-Marking the Way."

info from US Coast Guard Web Site