Question: When was the navy that was donated the LKL "Kursis" (M51) by Germany established?

Context paragraphs:
Gemeinsamer Ausschuss: The Joint Committee (German: Gemeinsamer Ausschuss) is a special body in the constitutional and institutional system of Germany established by Article 53a of the Basic Law for the Federal Republic of Germany (Grundgesetz, GG).  It exists to ensure a functioning legislature during a constitutionally established and declared "state of defense".  During a state of defense, as well as prior to its declaration, the Federal Government must inform the committee about its plans.

Reichskommissariat Ostland: Nazi Germany established the Reichskommissariat Ostland (RKO) in 1941 as the civilian occupation regime in the Baltic states (Estonia, Latvia, and Lithuania), the northeastern part of Poland and the west part of the Belarusian SSR during World War II.  It was also known initially as Reichskommissariat Baltenland ("Baltic Land").

German camp brothels in World War II: In World War II, Nazi Germany established brothels in the concentration camps ("Lagerbordell") to create an incentive for prisoners to collaborate, although these institutions were used mostly by Kapos, "prisoner functionaries" and the criminal element, because regular inmates, penniless and emaciated, were usually too debilitated and wary of exposure to Schutzstaffel (SS) schemes.  In the end, the camp brothels did not produce any noticeable increase in the prisoners' work productivity levels, but instead, created a market for coupons among the camp VIPs.  The women forced into these brothels came mainly from the Ravensbrück concentration camp, except for Auschwitz, which employed its own prisoners.  In combination with the German military brothels in World War II, it is estimated that at least 34,140 female inmates were forced into sexual slavery during the Third Reich.

Protectorate of Bohemia and Moravia: The Protectorate of Bohemia and Moravia (German: "Protektorat Böhmen und Mähren" ; Czech: "Protektorát Čechy a Morava" ) was a protectorate of Nazi Germany established following the German occupation of Czechoslovakia.  Earlier in 1938, with the Munich Agreement, Sudetenland territory of Czech Lands was incorporated into Nazi Germany as a Reichsgau.

Reichsgau Flandern: The Reichsgau Flanders (German: "Reichsgau Flandern"; Dutch: "Rijksgouw Vlaanderen") was a short-lived "Reichsgau" of Nazi Germany established in 1944.  It encompassed the present-day Flemish Region in its old provincial borders (in other words, including Comines-Warneton but excluding Voeren).  Brussels was also excluded and given its own territorial arrangement.

Lithuanian Naval Force: The Lithuanian Navy is the naval arm of the Lithuanian Armed Forces.  Though formally established on 1 August 1935 its roots stretch back as far as naval engagements on the Baltic Sea in the Medieval period.  Lithuanian naval units saw some service with Soviet naval forces during World War II, and the navy has been re-established in its own right and continues to expand since Lithuania's independence in 1990.

Reichsgau Wallonien: The Reichsgau Wallonia (German: "Reichsgau Wallonien"; French: "Gau du Reich Wallonie") was a short-lived "Reichsgau" of Nazi Germany established in 1944.  It encompassed present-day Wallonia in its old provincial borders, excluding Comines-Warneton but including Voeren.  Eupen-Malmedy and Moresnet were also omitted, both of which had already been incorporated into Germany after its victory in the Battle of France in 1940.

Albert-Schweitzer-Gymnasium Gundelfingen: Albert-Schweitzer-Gymnasium Gundelfingen is a school in Gundelfingen, Germany established in 1974.

LKL Sūduvis (M52): LKL "Sūduvis" (M52) is a minehunter of the Lithuanian Naval Force.  Built in West Germany in 1957 as "Koblenz" (M1071), a "Lindau"-class (or Type 320) minesweeper for the German Navy, she was upgraded to a Type 331 minehunter in the 1970s.  Germany donated "Koblenz" to the Lithuanian Naval Force in 1999.  The ship, renamed "Sūduvis", formed the nucleus of the Lithuanian Naval Force's Squadron of Mine-hunters, which was established on 22 June 1999.  The squadron was augmented in 2001 with the similar donation of sister ship "Marburg", which became "Kursis" (M51) .

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) .

Supporting paragraphs: LKL Kuršis (M51) Lithuanian Naval Force
Answer: 1 August 1935