USCGC MOBILE BAY (WTGB 103 & CGB 12002) Breaking the Trail... Marking the Way... Coast Guard Comment Policy

We welcome your comments on postings at all Coast Guard sites/journals.

These are sponsored by the U.S. Coast Guard to provide a forum to talk about our work providing maritime safety, security and stewardship for the American people to secure the homeland, save lives and property, protect the environment, and promote economic prosperity. The information provided is for public information only and is not a distress communication channel. People in an emergency and in need of Coast Guard assistance should use VHF-FM Channel 16 (156.8 MHz), dial 911, or call their nearest Coast Guard unit. All comments submitted are moderated. The Coast Guard retains the discretion to determine which comments it will post and which it will not. We expect all contributors to be respectful. We will not post comments that contain personal attacks of any kind; refer to Coast Guard or other employees by name; contain offensive terms that target specific ethnic or racial groups, or contain vulgar language. We will also not post comments that are spam, are clearly off topic, or that promote services or products. The U.S. Coast Guard disclaims any liability for any loss or damage resulting from any comments posted on this page. This forum may not be used for the submission of any claim, demand, informal or formal complaint, or any other form of legal and/or administrative notice or process, or for the exhaustion of any legal and/or administrative remedy. If you have specific questions regarding a U.S. Coast Guard program that involves details you do not wish to share publicly please contact the program point of contact listed at


36 S Neenah Ave
Sturgeon Bay, WI

General information

USCGC MOBILE BAY is the one of nine cutters in the Coast Guard’s “Bay” Class of icebreaking tugs. She is one of two Bay Class ships equipped with a 120-foot Aids-to-Navigation barge operating on the Great Lakes. Homeported in Sturgeon Bay, Wisconsin, the ship is located in the town once known as the “Shipbuilding Capital of the Great Lakes.” Built by the Tacoma Boatbuilding Company, MOBILE BAY was launched on Veteran’s Day, November 11, 1978 and was commissioned on September 2, 1979. The Barge was built by Marinette Marine Corporation, Marinette, WI; the Coast Guard accepted Barge 12002 on May 15, 1992. CGC MOBILE BAY has dual responsibilities in assisting safe navigation on the Great Lakes. The ship’s primary mission, and the one for which she was originally designed, is icebreaking. MOBILE BAY conducts its icebreaking mission from mid-December through mid-April. During the winter months, the cutter detaches from the barge and breaks ice in the Northern Lakes, operating mostly in Green Bay, the Straits of Mackinac, and the St. Mary’s River. The ship was designed with icebreaking in mind. Its high horsepower, specialized hull design, and “slick” bottom paint make this cutter one of the most efficient icebreakers in the world today. The cutter’s hull lubrication system, or “bubbler”, further increases its icebreaking capabilities. This system pumps air through openings in the hull below the waterline reducing ice friction, allowing the cutter to pass easily through ice fields. At full power and using all four sections of the “bubbler system” manifolds, MOBILE BAY is capable of breaking up to 30-inches of ice in continuous mode. In addition to the duty of icebreaking, when notched into CGB 12002, MOBLE BAY’s ample horsepower combined with the barge’s bowthruster create a highly maneuverable platform for servicing floating aids to navigation, or what is commonly called buoys. CGB 12002’s 20-ton capacity crane and large buoy deck area enable the Tug & Barge combination to effectively maintain over 100 buoys in Green Bay and upper Lake Michigan.


Be the first to know and let us send you an email when USCGC MOBILE BAY (WTGB 103 & CGB 12002) posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.