Lake Peipus Lake Peipus Lake Peipus (; ; ) is the largest transboundary lake in Europe, lies on the border between Estonia and Russia. The lake is the fifth-largest in Europe after Lake Ladoga and Lake Onega (in Russia north of St. Petersburg), Lake Vänern (in Sweden), and Lake Saimaa (in Finland). Lake Peipus represents a remnant of a body of water which existed in this area during an Ice Age. It covers , and has an average depth of , the deepest point being . The lake has several islands and consists of 3 parts: The lake is used for fishing
Finnish Ladoga Naval Detachment Finns had intended to mount further landing operations to secure the island of Valamo but Soviets withdrew from there as well as from most of the other island on the lake voluntarily. Finnish forces took control of the island of Valamo on 20 September and island of Konevitsa on 25 September. Since Soviet forces remained inactive on lake Ladoga for the rest of the 1941 Finnish naval forces concentrated on security and transport duties. After Finns had captured maps of the Soviet naval minefields on the lake several boats were detailed for minesweeping duties which however yielded no results nor