Best Submarine movies that are oscar winners

Actors : Sean Connery, Scott Glenn, Sam Neill, Alec Baldwin,
Directors : John McTiernan,

In November 1984, the Soviet Union's best submarine captain in their newest sub violates orders and heads for the USA. Is he trying to defect or to start a war?

Actors : Ed Harris, Michael Biehn, Leo Burmester, Mary Elizabeth Mastrantonio,
Directors : James Cameron,

A civilian diving team is enlisted to search for a lost nuclear submarine and face danger while encountering an alien aquatic species.

Actors : Matthew McConaughey, Harvey Keitel, Jon Bon Jovi, Bill Paxton,
Directors : Jonathan Mostow,

A German submarine is boarded by disguised American submariners trying to capture their Enigma cipher machine.

Actors : Donald Pleasence, Raquel Welch, Stephen Boyd, Edmond O'Brien,
Directors : Richard Fleischer,

A scientist is nearly assassinated. In order to save him, a submarine is shrunken to microscopic size and injected into his blood stream with a small crew. Problems arise almost as soon as they enter the bloodstream.