Since Soviet forces remained inactive on lake Ladoga for the rest of 1941 Finnish naval forces concentrated on security and transport duties. After the Finns had captured maps of the Soviet naval minefields on the lake several boats were detailed for minesweeping duties which yielded no results nor losses. In the spring of 1942 the Finnish commander made recommendations to German leadership past Finnish HQs leading to the formation of Naval Detachment K, which included adding the Finnish motor torpedo boat Sisu to the lake. They were also joined in the summer of 1942 by a German unit, the Einsatzstab Fähre Ost (EFO), of armed Siebel ferries. Operations of the Naval Detachment K or EFO had very limited success.
