Secrecy, in this war as in the last, marks the disappearance of German submarines. From the wreck of the typical U-boat there are no survivors; and when occasionally some few are picked up out of the oily water their stories are told only in the guarded chambers of the Intelligence Division at the Admiralty. Divers are sent down whenever U-boats are destroyed in the shallow waters surrounding the British Isles, but the last act of a German captain is almost always to destroy his confidential and secret papers. In any case the general public does not learn their contents.
How Many U-Boats Have Been Sunk?
By Robert M. Grant