If you're a diver or in ROV once this movie starts y'all feel their pain and frustration. Great movie to watch. They're in the works to remake the movie with A-list actors like Woody Harrelson. Thanks Steve Mc. for pointing this movie out to me.
Here's a brief description of the movie -
A deep sea diver is stranded on the seabed with 5 minutes of oxygen and no hope of rescue. With access to amazing archive this is the story of one man's impossible fight for survival.
You can find the movie on Netflix and Amazon video. Check out the trailer below.
The trailer for Last Breath

This movie gave me anxiety but it was a good nail biter.