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Renovation Completed On Seventh 140-foot Icebreaking Tug

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USCG Thunder Bay departs CG Yard


Coast Guard Cutter Thunder Bay departed from the Coast Guard Yard in Curtis Bay, Maryland, Dec. 11, 2018, following completion of its service life extension project as part of the In-Service Vessel Sustainment (ISVS) Program. Thunder Bay is the seventh of nine 140-foot icebreaking tugs to undergo service life extension work through ISVS. Work being completed to extend each cutter’s service life by 15 years includes upgrades to propulsion and electrical systems, replacement of the boat-launching davit and habitability improvements. The tugs entered service in the 1970s. Thunder Bay will return to Rockland, Maine. U.S. Coast Guard photo.

For more information: In-Service Vessel Sustainment program page