Beyond the Poseidon Adventure

The name of this movie is Beyond the Poseidon Adventure released in 1979-05-18 and it's main theme is After The Poseidon Adventure, in which the ship got flipped over by a tidal wave, the ship drifts bottom-up in the sea. While the passengers are still on board waiting to be rescued, two rivaling salvage parties enter the ship on search for money, gold and a small amount of plutonium..