History On February 19th, 1918, Wilhelmina was probably sunk by gunfire by the German submarine UB 64 (Woldemar Petri), near the Doggerbank. 6 persons were lost. Description Built: Gebr. Boot, LeiderdorpOwner: M. den Dulk., KatwijkMasterHollander, A. denPeople on board6Length82 feet (25 m)Width21.7 feet (6.6 m)Tonnage109 ton References Wrecksite.eu.Uitspraken van den Raad voor de Scheepvaart no. 54 27-05-1918.