''Open Water'' is a 2003 indie drama/thriller hybrid about a thirtysomething couple who find themselves stranded at sea when coming back from a scuba dive and realizing their boat has left without them. Based on the true story of a married couple who were lost at sea under the same circumstances.

There is a sequel, made in 2005, called ''Film/{{Adrift}}''. [[DolledUpInstallment It was not initially intended to be a sequel]], but the similar premise gave them the idea that changing the title would be more marketable.
!!This film provides examples of:

* DespairEventHorizon: [[spoiler: Susan, after her husband bleeds to death and she realizes she's not gonna last much longer]]. Also Daniel, earlier, when he screams "''We '''paid''' to do this.''"
* DevelopingDoomedCharacters: The first thirty minutes or so.
* DrivenToSuicide: [[spoiler: Susan, by the circumstances]].
* HopeSpot: When the boat crew realizes someone's been left behind and launches a rescue attempt. It looks like they're going to get there in time [[spoiler:to save Susan. They don't]].
* ModestyBedsheet: Averted, probably because it's an indie film. Early on Susan and Daniel are shown in bed together, and they're as comfortably nude around each other as you'd expect a married couple to be.
* PleaseDontLeaveMe: [[spoiler: Susan hysterically screams at Daniel not to "leave me out here all by myself"]].
* SayYourPrayers: [[spoiler: A dying Daniel babbles The Lord's Prayer as he succumbs to his injuries]].
* ShootTheShaggyDog: It is two hours of people stranded at sea waiting for a rescue [[spoiler:that will never come]].
* ShoutOut: The couple's surnames of Watkins and Kintner are those of the first and second, respectively, victims in ''Film/{{Jaws}}''.
* ThreateningShark: [[spoiler: The sharks eat one of them by the end]].
* VeryLooselyBasedOnATrueStory: The movie is based on the story of Tom and Eileen Lonergan, who were lost at sea after being left behind by their diving boat. As no one knows exactly what happened, the "at-sea" scenes (which comprise the majority of the movie) have been inferred.