Feuer unter Deck (1979)

Feuer unter Deck (1979), or Fire Below Deck, is a German romantic comedy about Otto, a steamboat captain who loves his steamboat just as much, if not more than his cocktail waitress girlfriend. Fed up with the amount of time he spends with the boat, his girlfriend leaves him, and he is soon informed that his boat is being put out of commission. On his last mission, his boat is hijacked by his former team who intends to use the boat to dislodge two barges from a sandbank.  One of the hijackers brings his girlfriend Blondie aboard the ship with them, played by the lovely Regine Heintze, and in one terrific scene, the two slip away for some below deck hijinks. Though we only get to see Regine's right rib cushion, it still looks pretty fantastic, even as the guy tries desperately to cover it up with his coat. Ravishing Regine Heintze might just cause a fire below your deck as well!