SM UB-78 was a German Type UB III submarine or U-boat in the German Imperial Navy () during World War I. She was commissioned into the German Imperial Navy on 20 October 1917 as SM UB-78. The submarine struck a naval mine off Dover and sank at position on 19 April 1918 all 35 crew lost.
Construction
She was built by Blohm & Voss of Hamburg and following just under a year of construction, launched at Hamburg on 2 June 1917. UB-78 was commissioned later that same year under the command of Kptlt. Woldemar Petri. Like all Type UB III submarines, UB-78 carried 10 torpedoes and was armed with a deck gun. UB-78 would carry a crew of up to 3 officers and 31 men and had a cruising range of . UB-78 had a displacement of while surfaced and when submerged. Her engines enabled her to travel at when surfaced and when submerged.
Summary of raiding history DateNameNationalityTonnageMerchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.Fate21 March 1918Strathearn152Damaged22 March 1918Polleon1,155Sunk25 March 1918HMD Border Lads86Sunk26 March 1918British Star6,888Damaged
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Bibliography
External links Scott, Graham (2015) ' UB-78 off Folkestone, Kent: Archaeological Report', Wessex Archaeology. Historic England project to research First World War submarine wrecks.