Our Fighting Navy (1937)
Our Fighting Navy (also known as Torpedoed) is a 1937 British action film directed by Norman Walker and starring Robert Douglas, Richard Cromwell and Hazel Terry. A British warship intervenes to protect British subjects and prevent a rebellion in a South American republic. The Royal Navy, viewing the film as a recruitment opportunity, provided warships and extras. The film was made by Herbert Wilcox Productions.
More at Wikipedia.