Atule (SS-403) strikes the captured German Submarine U-977 off Cape Cod, 13 November 1946

View showing torpedoing of U-977 by ATULE (SS403) on 13 November 1946. As noted by the Navy: The pressure hull of U-977 has apparently been completely severed by the detonation and that the forward and after portions of the hull have jack-knifed. U-977 was a standard German Type VII-C design: length 220′-2″; maximum beam 20′-4″; diameter of pressure hull 15′-5″; pressure hull plating thickness .73″; and submerged displacement 880 tons. The torpedo used by ATULE was a Mark 14 body fitted with a Mark 16, Mod. 4 magnetic proximity-fuzed warhead containing 660 lbs. of Torpex and is believed to have detonated almost directly underneath the keel of U-977. This photograph demonstrates the great destructive power of torpedoes when used against unprotected ships such as submarines.

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