The Russian submarine AG-12 was an AG-class (AG = Amerikansky Golland) submarine which served in the Gulf of Finland during World War I. During the war, Russian submarines operated from bases in Finland. AG-12 and three of her sisters were scuttled in Hanko harbor on 3 April 1918, just prior to the German landing there. AG-12 and AG-16 seemed to be in relatively good shape and the Finns decided to salvage them. AG-16 was transferred to Helsinki and the Finns asked both Germany and Electric Boat for estimates on the cost of repairs. The latter was so costly so only the German alternative remained. German experts evaluated AG-16, but the Finnish government never provided funds for the repairing of the submarine. The repairs would be costly and no shipyard were prepared to guarantee the resul