SM UB-73 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 2 October 1917 as SM UB-73.
UB-73 was serving in the Mediterranean. On 21 November 1918 she was surrendered to France as required by the regulations of the Armistice with Germany.
Construction
UB-72 was ordered by the GIN on 23 September 1916.
She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 11 August 1917. UB-73 was commissioned later that same year . Like all Type UB III submarines, UB-73 carried 10 torpedoes and was armed with a deck gun. UB-73 would carry a crew of up to 3 officer and 31 men and had a cruising range of . UB-73 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.Fate7 April 1918Catriena115Sunk11 April 1918Myrtle Branch3,741Sunk14 April 1918Chelford2,995Sunk16 April 1918Ladoga1,917Sunk16 April 1918Lodaner3,291Sunk18 April 1918Dalegarth Force684Sunk23 June 1918Mountain Laurel705Sunk24 June 1918495Sunk25 June 1918Orissa5,358Sunk
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