Leaving the base in the Finnish town of Hanko in October 1944, S-13 took position near the Hela peninsula, where the main German communication lines passed.
As master of the Baltic fleet, 14 March 1854, he reconnoitered the southern parts of Åland, Hanko Bay, Baro Sund, and the anchorage of Suomenlinna, preparatory to taking the fleet to those places.
The Battle of Gangut between Swedish and Russian navies was fought in 1714 in the archipelago north of the peninsula.
Kalev’s ultimate fate or the location of the wreck was unknown for a long time (it was usually assumed that she hit a mine and sunk off Keri in the Gulf of Finland between Tallinn and Helsinki, but she could have been anywhere between Kronstadt and Hanko; some sources suggested she was scuttled in the Tallinn Bay during the Soviet evacuation on 28 August 1941).
Today, the Finnish Railway Museum is based at the site of the original roundhouse and Hyvinkää railway station buildings in the town of Hyvinkää.
Hanko, Charles William (1955)"The Evangelical Protestant Movement",Educators Publishing Co.,Brooklyn, NY.