Emergency Ascent
Definition
An emergency ascent is an unplanned return to the surface due to out-of-air situations, equipment failure, or diver distress.
More on Emergency Ascent
Emergency ascents are serious procedures used when a diver must reach the surface urgently. There are different types: - Controlled Emergency Swimming Ascent (CESA): A slow, exhaled ascent from shallow depth. - Buoyant Ascent: Discarding weights or inflating the BCD to rise. - Buddy Ascent: Sharing air with a buddy using their alternate second stage. All emergency ascents should be practiced under supervision and only used when a safe ascent is otherwise impossible. Proper gas planning and buddy protocols help avoid these situations.
Frequently Asked Questions
CESA involves ascending slowly while exhaling continuously, often from less than 30 feet (9 meters), when no air is available.
As a last resort if unconscious or without air at depth. It's riskier due to rapid ascent but may be life-saving.
Monitor gas supply, dive with a buddy, stay within limits, and practice air-sharing and self-rescue techniques regularly.
Whenever possible, signal your buddy and ascend together while sharing air. Ascend slowly and never hold your breath.
Yes. Entry-level courses teach CESA and buddy air-sharing as core rescue skills.