47 Meters Down - Uncaged DVD   Altitude

Johannes Roberts directs this horror which follows four girls in a battle for survival.
When the group go diving in a remote spot far away from the spoil of tourists, they are thrilled to discover Mayan ruins deep underwater.
Their fun adventure is short-lived, however, when they discover dangerous sharks lurking in the confined maze and find themselves trapped.
In a race against time, they must get themselves to safety before either their luck, or oxygen, runs out.