I have come across a post from wingman15 about my grandfathers Kriegsmarine Cap. The question I have now is was
Koblenz a HJ training school or camp or was the "Koblenz" a patrol boat that operated near Norway. Resource requisite.eu At 19:25, SCHIFF 9 (KOBLENZ) hits a mine and sinks in a few minutes. V-105 (CREMON), coming to the rescue of SCHIFF 9 (KOBLENZ), also hits a mine and sinks. BREMEN, damaged by the explosion, also sinks.

It would be great if someone here could help me understand my grandfathers history.