USCGC Thunder Bay (WTGB 108) is due at the Pilot at 10001230.
She is A Bay Class (all class members are named for Bays) Icebreaking tug, based out of Rockland Maine. She arrived in fog, and Tied up at pier NB (AKA November Bravo, Navy B).

Update:
Mac, of Shipfax, informs me she will winter in the Great Lakes, providing Ice Breaking services.

Photos later today.