For four years the German U-boats of U-FlottilleFlandern would become a serious threat to theomnipotence of the Royal Navy and its fleet. By theend of the war they had managed to sink a totalof 2,554 Allied ships, totaling 2.5 million tons ofshipping. The Royal Navy put everything it had at itsdisposal to defeat the U-boats. Mines, steel nets, patrolcraft, Q-ships, aircraft, airships, convoys, espionageand specially equipped salvage units had to eliminatethe activities of the U-boat. As a consequence, thesecountermeasures caused the loss of 80% of the U-boatswhich were stationed in the Flemish ports.Underwater archaeologist and naval historianTomas Termote visited the wrecks of many U-boatsand has unraveled many of their secrets. He also writesabout life on board the U-boats, their importancein the war and the heavy losses on both sides. Forthe first time a detailed insight in this unique part ofhistory is given with an account of the fate of everyU-boat of the fleet. Illustrated with underwater colourphotographs of the wrecks, drawings of the sites andartefacts which helped identify unidentified sites,including that of UB-88, which ended up after the warin US waters where she was paraded in every big porton the US East coast, and sailed right up north alongthe West coast where it ended its life after being sunkoff San Diego.