The name of the ship Tanger pretends to escape in the end is the Felix Von Luckner. As in the novel, this is an inside joke referring to the real Felix Von Luckner, a German count and privateer from World War 1. Von Luckner converted a captured Norweagian tall ship into an armed corsair, complete with secret passages, naval guns mounted on elevators and manned by a crew of Norweagian fluent men with down-to-detail disguises. Named the Sea Adler, she ship wreaked havoc in the British South Atlantic and South Pacific routes, before being sunk by a rogue wave. This fits perfectly with the themes of betrayal and double cross the movie is about.