U.S. Coast Guard Great Lakes has ten active
cutters operating in all five
Great Lakes. Cutter is a term used by the U.S. Coast Guard for its commissioned vessels. They are 65 feet (19.8 m) or greater in length and have a permanently assigned crew with accommodations aboard. They carry the ship prefix USCGC. Due to the requirement of
Rush–Bagot Treaty, the cutters assigned to the Great Lakes are minimally armed, save for a few machine guns. •
USCGC Spar (WLB-206) is a 225-foot multi-mission cutter located in
Duluth, Minnesota after switching home ports with her sister ship,
USCGC Alder (WLB-216). Its primary missions are to aid in navigation, ice breaking, law enforcement, and search and rescue. In addition,
Spar performs missions such as marine environmental protection and port security.
Spar operates on all five
Great Lakes, however, most of its operations are in
Lake Superior and
Lake Michigan. • ''''
is a 140-foot icebreaking tug stationed in Saint Ignace, Michigan. Its primary mission is to maintain tracks in the connecting waterways in the Great Lakes and assist vessels through icebound shipping lanes. Biscayne Bay'' operates widely throughout the great lakes. Primary areas of operation are the
Straits of Mackinac and the
St. Mary's River. In addition, the cutter operates in the
St. Clair/
Detroit River system,
Green Bay, Wisconsin,
Duluth, Minnesota, and
Thunder Bay, Ontario. •
USCGC Bristol Bay (WTGB-102) is a 140-foot icebreaking tug stationed in
Detroit, Michigan. Its primary responsibility is opening and maintaining icebound shipping lanes in the
Great Lakes. In addition,
Bristol Bay performs missions such as search and rescue, marine environmental protection, law enforcement, and port security and safety. U.S. Coast Guard engineers designed
Bristol Bay. • '
USCGC Buckthorn
(WLI-642)' is a 100-foot inland buoy tender stationed in
Sault Ste. Marie, Michigan. Its primary missions are aids-to-navigation within the Sault Ste Marie's River System, homeland security, and public affairs.
Buckthorns area of responsibility expands from
Whitefish Point, Michigan thru Sault Ste Marie's River.
Buckthorn is the oldest cutter in the
Great Lakes. • ''''
is a 225-foot seagoing buoy tender stationed in Port Huron, Michigan. It is responsible for approximately 150 aids-to-navigation on mainly Lake Huron, Lake Michigan, and Lake Erie. Hollyhock
other primary missions include search and rescue, environmental protection, and domestic ice-breaking. Hollyhock'' was built in 2003 to replace WWII-era . • ''''
is a 140-foot Bay-class icebreaking tug stationed in Sault Sainte Marie, Michigan. Its primary missions include icebreaking, homeland security patrols, lighthouse projects, law enforcement, and public affairs. Katmai Bay'' operates within all
Great Lakes. • ''''
is a 240-foot vessel stationed in Cheboygan, Michigan. It is the only U.S. Coast Guard cutter in the Great Lakes designed for heavy icebreaking and specifically used for multi-mission capabilities, such as environmental response, homeland security, and search and rescue. Mackinaw'' contains state of the art technology such as its ability to deploy an oil skimming system to respond to oil spill incidents. • ''''
is a 140-foot vessel designed for icebreaking and is stationed in Sturgeon Bay, Wisconsin. Mobile Bay'' conducts icebreaking missions near
Green Bay, Wisconsin,
Straits of Mackinac, and the
St. Mary's River from mid-December through mid-April. Its other missions include maritime law enforcement, search and rescue, environmental pollution response, and homeland security. •
USCGC Morro Bay (WTGB-106) is a 140-foot Bay-class icebreaking tug stationed in
Cleveland, Ohio. Its primary missions include icebreaking, homeland security patrols, lighthouse projects, law enforcement, and public affairs.
Morro Bay operates within all
Great Lakes and has coined the nickname, "Jack of all trades". •
USCGC Neah Bay (WTGB-105) is a 140-foot Bay-class icebreaking tug stationed in
Cleveland, Ohio. Its primary missions include icebreaking, homeland security patrols, light house projects, law enforcement, and public affairs.
Neah Bay operates broadly within all
Great Lakes. ==Marine Safety Units==