PADI Rescue Diver — Recognizing and Managing Dive Emergencies

Why Rescue Recognition Matters in Aquaculture Diving

Commercial divers working in aquaculture — net-pen inspection, fish health surveys, equipment maintenance — operate in environments where help may be far away and conditions change quickly. A diver who becomes a victim in the first sixty seconds of an incident is preventable; a diver who becomes a victim in the tenth minute usually was not recognized early enough. The PADI Rescue Diver course builds the systematic observation skills that let you intervene before a situation becomes fatal.

The Stress-to-Panic Continuum

Diver emergencies rarely begin with a sudden catastrophe. They follow a recognizable progression:

Pre-dive anxiety — A diver checks gear repeatedly, breathes rapidly at the surface, or refuses to descend without a clear reason. This is the easiest point to intervene with calm reassurance or by aborting the dive.

In-water stress — Underwater, a stressed diver shows wide eyes, erratic or rapid fin kicks, breath-holding behavior, or refusal to leave a comfortable depth. Air consumption rises sharply. The diver may grip equipment, a line, or a buddy.

Panic onset — Rational thought collapses. The diver may bolt to the surface, drop weights or a regulator, or push a rescuer away. Panic onset is the critical transition: intervention is still possible but requires physical control techniques.

Unresponsive diver — The diver is unconscious at depth, at the surface, or has been removed from the water. This is a medical emergency requiring immediate in-water airway management, controlled tow, removal from the water, rescue breathing or CPR, supplemental oxygen, and EMS activation.

Recognizing which stage a diver is in determines your first action.

Surface Recognition

Most rescues begin at the surface, where you have the best observation angle. Watch for:

• A diver who signals OK but does not swim toward the boat or shore
• Erratic or asymmetric kicking
• High in the water (inflated BCD) but not making progress
• Mask on forehead (a classic distress indicator)
• Regulator or snorkel out of the mouth without a clear reason
• Unusual stillness or face-down position

On an aquaculture worksite, deckhands and surface-support personnel must be briefed to watch for these signs continuously during dive operations, not only when a diver surfaces.

Approaching a Stressed or Panicked Diver

A panicked diver is dangerous. They may push you underwater in an attempt to stay above the surface. The PADI Rescue Diver approach for a conscious, panicked surface diver is:

1. Talk first from a safe distance. Give a clear, calm command: "I'm here to help — stop kicking and float."

2. Offer equipment, not your body. Throw a rescue buoy, float, or inflated BCD. Let the diver grab the object rather than you.

3. Approach from behind if physical contact is necessary. Control the diver's BCD or tank valve to prevent them from turning on you.

4. Establish positive buoyancy for both divers immediately — inflate BCDs, drop weights if needed.

For an unresponsive surface diver, approach is less cautious because no defensive response is possible. Open the airway as soon as you reach them, give two rescue breaths if trained, then tow face-up to the boat or shore while maintaining the airway.

In-Water Airway Management and Towing

For an unresponsive diver at the surface, the priority sequence is:

1. Check for responsiveness — shout and tap.

2. Open the airway (head-tilt/chin-lift adapted for water).

3. Give rescue breaths — two initial breaths, then one breath every five seconds during tow.

4. Remove the diver's mask and, if needed, the regulator.

5. Tow the diver using a technique that keeps the face clear of the water (extended-arm tow or tank-valve tow).

Do not attempt full CPR in the water — chest compressions are ineffective when the diver is floating. Get them out of the water as quickly as possible.

Removal from Water and Post-Rescue Care

Removing a diver from the water safely is physically demanding. On an aquaculture worksite with a vessel, use a ladder, lifting harness, or net ramp. Minimize spinal movement if a head or neck injury is suspected. Once on a stable surface:

• Begin CPR if there is no pulse and no normal breathing.
• Place a conscious, breathing diver in the recovery position.
• Administer supplemental oxygen using a non-rebreather mask at the highest flow rate the unit allows. Oxygen administration is a standard PADI Rescue Diver skill and is especially important for decompression illness, near-drowning, and carbon monoxide exposure.
• Activate EMS (call 911 or the local emergency number) at the earliest opportunity — do not delay oxygen or CPR to make the call; assign it to another person.
• Document the incident: dive profile, time of rescue, interventions given, and diver's condition on handover to EMS.

Safety Reminders for Aquaculture Dive Sites

• Never enter the water to perform a rescue without your own BCD, mask, and fins. A rescuer who becomes a second victim helps no one.
• Maintain a charged emergency oxygen unit on every dive vessel. Check the regulator and mask seal before each dive day.
• Ensure surface-support personnel know the site EMS number and the nearest hyperbaric chamber location before any dive begins.
• Follow your site's dive emergency action plan — it should be posted visibly on the vessel or dock.