Lake Onega of Petrozavodsk–Kizhi, Petrozavodsk–Velikaya Guba and Petrozavodsk–Shala. They are run by hydrofoil and motor ships and are used for passenger transport as well. In addition, passenger ships go on the route Petrozavodsk – Shala. Sailing is a popular activity on the lake and there is a sailing club in Petrozavodsk. Since 1972, every year at the end of July the lake has hosted the largest regatta in Russia ("") which is the Russian Open Championship in the Russian class of Cruisers Yachts "Open800". The regatta has international status. The largest city on the lake is Petrozavodsk – the capital of Republic
Lake Onega the early 18th century. Also advanced is metallurgy, especially in the Petrozavodsk area which produces about 25% of industrial products of Karelia. Water level of the lake is controlled by the Nizhnesvirskaya (, "Lower Svir") and Verkhnesvirskaya (, "Upper Svir") hydroelectric power plants. The former was built between 1927 and 1938 and has a peak power of 99 MW. The construction of Verkhnesvirskaya plant started in 1938, but was interrupted by World War II and could only be resumed in 1947. The plant was completed in 1952 and provided 160 MW of electric power. The associated with the plant Verkhnesvirsk