When was the navy that was donated the LKL "Kursis" (M51) by Germany established?
LKL Kuršis (M51) LKL "Kursis" (M51) is a minehunter of the Lithuanian Naval Force. Built in West Germany in 1958 as "Marburg" (M1080), a "Lindau"-class (or Type 320) minesweeper for the German Navy, she was upgraded to a Type 331 minehunter in the 1970s. Germany donated "Marburg" in 2001 to the Lithuanian Naval Force, which renamed the ship "Kursis". The vessel augmented the Squadron of Mine-hunters, which had been established in 1999 with the similar donation of sister ship "Koblenz", which became "Sūduvis" (M52) .
Type 41 class patrol boat The "Type 41" Class was a type of patrol boats of the Military of Switzerland, commissioned during the Second World War to patrol the border lakes of Switzerland. The class comprised nine units, commissioned between 1941 and 1944 in three series: "Thun" and "Brienz" in December 1941, "Sargans", "Schwyz" and "Unterwalden" in July 1943, and "Spiez", "Bönigen" and "Brunnen" in April 1944; Furthermore, the prototype "Uri" was also commissioned. They remained in service until late 1983, when they were replaced by the more modern Type 80 ("Aquarius" class). In 1962, the units of the class were upgraded with an electric generator, radars and radios, and had their armament upgraded: the Type 41 anti-tank rifle at the bow was replaced by a 20mm autocannon, and the twin anti-air MG 38 machine guns at the stern were replaced by an MG 51 machine gun.