Based on

Movies like Lifeline to Victory (1993)

Paul Devereaux is a second officer with lots of experience with merchant ships. But this is World War II and the Royal Canadian Navy desperately needs experienced officers. Paul is thus given command of his own ship. However, in early 1940's, Canadian Navy does not have the biggest budget nor the most qualified enlisted men. Paul's ship must escort merchant ship to Europe and back and take part in the longest naval battle in history.