Dette merke er fra den tyske kreuzer Karlsruhe. Under kommando av Kapitän zur See Rieve hadde krysseren som oppgave å transportere og sikre den tyske overfarten om morgenen 9. april 1939 og kom i kamp med Odderøya fort ved innseilingen til Kristiansand. Krysseren vendte tilbake mot Tyskland om ettermiddagen den 9. april. I Skagerrak kl. 19.58 ble hun truffet av en torpedo fra den engelske U-båten HMS «Truant» (N68) under kommando av Lt.Cdr. C.H. Hutchinson, RN. Dette satte begge maskiner, det elektrikske anlegget, ror og lensepumper ut av drift. Skipet fikk raskt slagside og begynte å synke. Kl 2100 gikk mannskapet over til torpedobåtene «Luchs» og «Seeadler». Idet skipet nå var sunket til skansekledningen, ga kaptein Rieve ordre til torpedobåten «Greif» om å senke skipet. Kl. 2250 fikk «Karslruhe» nådestøtet i form at to torpedoer.
Karlsruhe was a light cruiser, the second member of the Königsberg class, and was operated between 1929 and April 1940, including service in during the Second World War. She was operated by two German navies, the Reichsmarine and the Kreigsmarine and had two sister ships, Königsberg and Köln. Karlsruhe was built by the Deutsche Werke shipyard in Kiel, was laid down in July 1926, launched in August 1927, and commissioned into the Reichsmarine in November 1929. She was armed with a main battery of nine 15 cm SK C/25 guns in three triple turrets and had a top speed of 32 knots (59 km/h; 37 mph). Like her sisters, Karlsruhe served as a training cruiser for naval cadets throughout the 1930s. During the Spanish Civil War, she joined the non-intervention patrols off the Spanish coast. She was in the process of being modernized at the outbreak of the Second World War in September 1939, and so she was not ready for action until April 1940, when she participated in Operation Weserübung, the invasion of Norway. She landed troops at Kristiansand, and while returning to Germany, she was attacked by the British submarine HMS Truant; two torpedoes hit the ship and caused significant damage. Unable to return to port, Karlsruhe was scuttled by one of the escorting torpedo boats.