The Heroine class are a variant of the Type 209 diesel-electric attack submarine developed by Howaldtswerke-Deutsche Werft (HDW) of Germany, currently in service with the South African Navy.
NMS Marsuinul (The Porpoise) was a submarine of the Romanian Navy, one of the few warships built in Romania during the Second World War. She was the largest Romanian-built submarine and the most powerful and modern Axis submarine in the Black Sea.
