Freediving Safety
Freediving is safe when practised with the right knowledge and a trained buddy. These protocols are endorsed by the Freediving Association of India and follow AIDA International standards.
Critical: Shallow-water blackout can happen to any freediver, at any level, without warning. The only effective prevention is a trained buddy watching every dive.
The Eight Core Rules
Never Dive Alone
This is the single most important rule in freediving. Shallow-water blackout (SWB) can happen silently at any depth, with no warning. An unconscious freediver underwater will drown in minutes without a trained buddy watching. Every dive — pool or open water, recreational or training — requires a dedicated, attentive buddy on the surface.
Observe Surface Intervals
After every breath-hold dive, wait at least twice the dive duration before your next attempt. If you dived for 2 minutes, rest at least 4 minutes. This allows CO₂ levels and oxygen saturation to fully recover. Rushing into a second dive while hypoxic is the leading cause of training-related blackouts.
Buddy Watches the Whole Dive
Your buddy must stay at the surface with eyes on the diver for the entire duration of the dive — not diving simultaneously. One diver, one watcher. The buddy must be ready to enter the water and rescue immediately. Watching from a boat deck or shoreline is not adequate for depth diving.
Recognise LMC and Blackout
A Loss of Motor Control (LMC) presents as uncontrolled convulsions of the arms and face, usually within 10 metres of the surface. A blackout is full unconsciousness. Both require immediate in-water rescue: support the diver's airway above the surface, remove the mask, stimulate breathing with firm taps and the command 'breathe', and call for emergency help if they don't recover within 30 seconds.
Don't Freedive After a Full Meal
Diving with a full stomach restricts diaphragm movement and dramatically increases the risk of vomiting and aspiration underwater. Wait at least 2–3 hours after a full meal. Light snacks 1 hour before diving are generally safe. Avoid alcohol entirely before and during any freediving session.
Equalise Early and Often
Begin equalising before you feel pressure — ideally every 1–2 metres on descent. Forcing equalization against a locked eardrum causes ear barotrauma, which can mean burst eardrums, vertigo, and permanent hearing damage. If you cannot equalise, abort the dive. Never descend through pain.
Monitor for Hypothermia
Cold water accelerates heat loss far faster than air. Repeated long dives without adequate exposure protection cause progressive hypothermia, which impairs both judgment and physical performance. In Indian waters, a 3mm wetsuit is adequate for the Andamans; in deeper or cooler seasons, a 5mm suit is recommended. Exit the water if you are shivering uncontrollably.
Know Your Medical Contraindications
Do not freedive if you have a current ear or sinus infection, asthma that is not well-controlled, any recent chest or ear surgery, or cardiac arrhythmia. Hyperventilation before a dive is extremely dangerous and must never be practised — it suppresses the urge to breathe while oxygen continues to drop, masking the approach of a blackout.
Blackout Rescue — Step by Step
If your dive buddy surfaces unconscious or convulsing, act immediately. Time matters — brain damage begins within 3–4 minutes of oxygen deprivation.
- 1
Do not leave the diver alone.
- 2
Support their airway above water — tilt the head back.
- 3
Remove the mask immediately.
- 4
Tap firmly on the cheeks and say "breathe" loudly.
- 5
If breathing resumes, keep the diver supported at the surface until fully conscious.
- 6
If not breathing within 30 seconds, begin rescue breathing in the water.
- 7
Get the diver onto solid ground and call emergency services (112 in India).
- 8
Place in recovery position if conscious but unsteady.
This guidance follows AIDA International rescue protocols. All freedivers are strongly encouraged to complete a certified rescue course (minimum AIDA 2 or equivalent).
The Hyperventilation Myth
Many beginners believe that taking many rapid deep breaths before a dive will increase oxygen and allow longer breath-holds. This is both false and dangerous.
Hyperventilation does not significantly increase blood oxygen — but it does dramatically reduce CO₂. Because it is rising CO₂ (not falling O₂) that triggers the urge to breathe, hyperventilation suppresses your body's warning signal while your oxygen continues to fall silently. The result is blackout with no warning.
Correct preparation involves slow, relaxed breathing — 2–3 deep diaphragmatic breaths over 60–90 seconds, never rapid panting. FAI follows AIDA International's strict prohibition on hyperventilation at all events and training sessions.
Learn from a Certified Instructor
The safest way to learn freediving is under qualified supervision. Find a certified AIDA or Molchanovs instructor in India through our directory.