By the fall of 1915, U-boats ... the captain’s cabin and run out with top-secret baggage. Some decoy ships were fitted with explosive-filled tin canisters, which were fired when a German shell ...

Under the command of Lt. Cmdr. Maurice Jester, the cutter Icarus sank a German submarine in less than an hour.

The weapon would be the submarine, U-boats. On a desolate mud bank in the salt marshes of Kent lies the metal carcass of a First World War German U-boat. British ships were blockading German ports ...