At the time of writing this the story/plot is still wrong. I submitted a correction several days ago and still no updated(corrected) plot. It has absolutely nothing to do with ships or U-boats. It's about American pilots helping the Brits.
Extremely low budget ($1,500,000) movie and it shows. It seems that they could not even afford to rent time on a cheap flight simulator for filming the cockpit scenes. Starts out with an idea for a story and goes down hill from there. Poorly delivered dialogue combined with amateur grade school level acting and no action sequences to speak of, made for a real snoozefest. Even the aerial flyby scenes barely made this corpse of a movie twitch in its' grave. If the budget was not a government grant or even if it was, then it was money not even well wasted.