Trivia: The film-makers only had three vintage US aircraft for the production, namely two F4F Wildcat fighters and a PBY Catalina search plane. All of the other aircraft that appear are from either wartime footage or from previous war movies.
Trivia: Kenneth Connor's line, "I've been regular for eighteen years", is an in-joke about his time in the "Carry On" films. He made his debut in 1958, and when the film was released in 1976, he was in the films for eighteen years.