Worldwide known because of the "nipple slip" sequence of Samantha Fox while performing "I surrender" on the deck before the very eyes of hundreds of sailors and millions of TV viewers.
The (playback) singing sequence was oddly introduced by a Yves Mourousi claiming that Samantha Fox is a Mae West, matter of bust size, and talking with the battleship Commander about lifejackets, that were supposed to have some origin in Mae West's down jackets...
the title is a pun about the traditional song "Les gars de la marine" and the TV channel slogan back then, which was: "Y en a qu'une c'est la une !"
Interviewed by journalist Christophe Carrière for his book about Yves Mourousi (Yves Mourousi - Ombre et Lumière, 2013), producer Gérard Louvin, present for supporting the singer he was producing (Florent Pagny), recalled that the show was technically a genuine disaster, that in his whole lifetime he never ever saw such disorganization ("de ma vie, jamais je n'ai vu une telle désorganisation [...] pas une personne compétente ni un producteur digne de ce nom" pour atténuer le désastre).
Special evening pretended to be aired live, but actually shot on 2 days between Toulon and Cannes on the now retired/sold Foch aircraft-carrier (twin battleship of the Clémenceau), is dedicated to TV-channel TF1, music/hits of the time and the French Navy.
Oddly the director wasn't a specialist in music shows, at all, and the show aspect was... mitigate.