Lost

One hundred and seventy-eight German submarines were " lost in action " during the war, according to Navy Department reports, and 5,364 men, including 515 officers, perished.

Depth charges sank 37; fixed mines, 36; fights with enemy submarines, 20; engine trouble, 14; torpedo boats, destroyers and subchasers, 13; accidental ramming, 8; armed fishing craft, 6; airplane bombs, 6; and submarine nets, 6. Three were sunk by regular patrol vessels, 3 by armed auxiliaries, 2 by cruisers, 2 by artillery fire, 1 by a liner at the entrance to the British base at Scapa Flow.

Fifty-six were lost in the English Channel, 26 in the North Sea, 16 in the Mediterranean, 16 on the East Coast of England, 12 on the Dutch coast, 3 near Heligoland, 2 in Scapa Flow, and the remainder scattered throughout the world's oceans.

Two hundred and eighty-one Unterseebooten were built during the war, and 197 were under construction at the time of the Armistice.