HOW TO PERFORM THE CONTROLLED EMERGENCY SWIMMING ASCENT (CESA) The Controlled Emergency Swimming Ascent (CESA) and Out-of-Air Emergencies Imagine that you are swimming peacefully underwater.
How fast of an ascent is too fast? The answer varies among scuba certification organisations. Some organisations list a maximum ascent rate of 30 feet/
FOUR EMERGENCY ASCENT PROCEDURES In principle, there are four emergency ascent procedures for low-on-air/out-or-air situations: Normal Ascent – The diver ascends at a normal rate with