Thunder Afloat (1939) is a Action, Drama, Romance, War film that follows a tugboat captain serves under his rival as a U-boat chaser in World War I. Thunder Afloat is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 5.9 out of 10 from 5 votes. Fans of action movies may also want to explore similar titles below.