Kriegsmarine ( German Navy in WW II )
I had to upload this because SP's recent uploads might some very young lads lead to the impression the RN was the only Navy in the NorthSea. We all know she ruled the waves at the end....
LOL at the flag signal education at 04:08, my Dad was still able to send a message that way twice as fast as I can type on my keyboard when he was 80 yo