On his way to Venus, his first ship, Albert Poop-Decker finds his Midshipman's uniform stolen by Sally in a Plymouth house of ill-repute. He then finds himself press-ganged onto Venus anyway, where Sally is indeed posing as the Midshipman. Silly Sally. Silly Navy.—Jeremy Perkins {J-26}
Kenneth Williams, Charles Hawtrey, Bernard Cribbins
IMDB plot
This is the tale of Albert Poop-Decker, a newly commissioned Midshipman (although he took 8 1/2 years to qualify). He joins the frigate Venus, and adventures through Spanish waters, mutinee and Pirates taking his Captain, his sweet-heart and his best-friend with him! With mistaken identities and shipwrecks awash, it's a surprise any of them live to tell the tale!