U-Boat Bases and Bunkers: U-Boat Bunkers located in separate basins within harbors were connected to the harbor via a series of locks. These locks proved to be weak spots after the British commando raid by HMS Campbeltown and dedicated bunker complexes were built to protect the locks.
Charles McCain is a Washington DC based freelance journalist and novelist. He is the author of "An Honorable German," a World War Two naval epic. You can read more of his work on his website: http://charlesmccain.com/ View all posts by Charles McCain