The Baltic Sea is a sea of the Atlantic Ocean, enclosed by Scandinavia, Finland, Estonia, Latvia, Lithuania, Russia, Poland, Germany and the North and Central European Plain.
Captain at sea is a naval rank corresponding to command of a ship-of-the-line or capital ship.
Fregattenkapitän, short: FKpt / in lists: FK, is the middle senior officer rank in the German Navy / armed forces of Germany (Bundeswehr).
Gdańsk (Danzig) is a Polish city on the Baltic coast.
Georg-Wilhelm Schulz (10 March 1906 – 5 July 1986) was a German U-boat commander of the Second World War.
German (Deutsch) is a West Germanic language that is mainly spoken in Central Europe.
Kapitänleutnant, short: KptLt / in lists: KL, (Lang-en: Captain lieutenant) is an officer grade of the captains military hierarchy group of the German Bundeswehr.
Königsberg is the name for a former German city that is now Kaliningrad, Russia.
Korvettenkapitän, short: KKpt / in lists: KK, is the lowest senior officer rank in the German Navy / armed forces of Germany (Bundeswehr).
The Soviet Navy (Military Maritime Fleet of the USSR) was the naval arm of the Soviet Armed Forces.
U-boat is an anglicised version of the German word U-Boot, a shortening of Unterseeboot, literally "undersea boat".
The 6th U-boat Flotilla (German 6. Unterseebootsflottille), also known as Hundius Flotilla, was a front-line unit of Nazi Germany's Kriegsmarine before and during World War II.