Dive Safety, Emergency Response, and PADI Rescue Diver Skills — Aquaculture & Marine Science Tech

Objective. Students will demonstrate PADI Rescue Diver emergency response skills—including panicked diver management, unconscious diver rescue from depth, and in-water CPR setup—and articulate how these skills apply to underwater reef restoration work sites.

Why Rescue Skills Matter on Reef Restoration Sites

Reef restoration dives are working dives. Divers carry tools, handle coral fragments, and often work in teams spread across a large site. Fatigue, task-loading, and unfamiliar conditions increase the chance that something goes wrong. A diver who is exhausted from a long surface swim, anxious about the task, or suddenly unwell can deteriorate fast. Every member of a restoration team must be prepared to recognize an emergency and act—not wait for someone else to respond.

The PADI Rescue Diver course builds exactly those skills. Completing it is a requirement for this program and a credential that employers in aquaculture, marine research, and reef management recognize immediately.

Recognizing an Emergency Early

The best rescue is the one you prevent. Watch your buddy and teammates for early warning signs: rapid, shallow breathing at the surface; wide eyes or a blank stare; struggling to inflate a BCD; refusing to descend or suddenly bolting to the surface. A diver showing any of these signs needs attention before a minor problem becomes a life-threatening one.

Approach carefully. A panicked diver can push you underwater and drown you both. Stay at arm's length, make eye contact, speak calmly and clearly, and ask a yes/no question—"Are you okay?"—to assess responsiveness. If the diver is conscious and tired but calm, you can move directly into an assist.

Tired Diver Assist

A tired diver is not yet panicked but is running out of reserve. Your first action is to establish positive buoyancy for both of you—inflate your BCD, inflate theirs if they have not already done so, and have them drop weights if needed. Once both of you are stable on the surface, position yourself for a tow.

The most common tow used in PADI training is the tank-valve tow: you reach behind the diver, grip their tank valve or the backplate with both hands, and kick on your back toward the exit. Keep the diver's airway above the water surface. For a tired but cooperative diver, a modified tow where they hold your tank or your extended arm is also acceptable. The 25-meter tow practiced in the pool replicates a realistic surface distance from a problem area to a boat or shore exit.

Unresponsive Diver Recovery

An unresponsive diver underwater is the highest-urgency scenario you will face. Work through these steps deliberately but quickly:

1. Signal your buddy and note your depth and the victim's position.

2. Establish positive buoyancy for the victim underwater—inflate their BCD or drop their weights so the ascent is controlled.

3. Begin a controlled ascent, staying within safe ascent-rate guidelines. Do not race to the surface; a decompression injury on top of a drowning emergency compounds your problems.

4. At the surface, inflate your own BCD, remove the victim's mask, and open the airway by tilting the head back.

5. Check for breathing for no more than 10 seconds. If absent, begin rescue breaths using a pocket mask—two initial breaths, then one breath every five seconds while moving toward the exit.

6. Call for help as soon as a teammate or bystander is within earshot. Designate someone to retrieve the O2 unit and call emergency services or DAN.

In-water CPR (chest compressions) is not practical and not part of the PADI Rescue Diver skill set; compressions begin once the victim is on a solid surface. Your goal in the water is airway management and rapid transport.

O2 Administration and the Emergency Action Plan

Supplemental oxygen is the most important immediate treatment for a diving accident, including near-drowning and decompression illness. Every dive team operating a restoration site should have a functional O2 unit on the surface, with at least one person trained to use it.

The Emergency Action Plan (EAP) formalizes who does what when something goes wrong. A complete EAP for a reef restoration site includes:

1. Emergency contact numbers—DAN (Divers Alert Network) emergency line, local EMS, and the site supervisor.

2. Nearest hyperbaric (recompression) chamber—location, distance, and how to transport a victim there.

3. O2 administration protocol—equipment location, how to assemble the demand valve or non-rebreather mask, and who is trained.

4. Role assignments—rescuer in water, surface tender, O2 provider, caller to EMS, and note-taker (record times, events, and any medications).

5. Site-specific information—GPS coordinates or address, boat or shore access, and any hazards (currents, boat traffic) that affect rescue logistics.

Develop the EAP before you enter the water, not after an incident begins.

Safety Reminders for All Scenarios

Never approach a panicked diver head-on without a flotation device between you.
Use a pocket mask for rescue breathing; direct mouth-to-mouth contact on a wet face is ineffective and poses infection risk.
Report all incidents to the site supervisor immediately, even if the diver appears to recover fully; delayed symptoms of decompression illness can appear hours later.
Do not remove SCUBA gear from an unresponsive diver underwater; it helps maintain buoyancy during ascent.
Wear appropriate PPE for the water environment: wetsuit, gloves, and boots protect you during a rescue as much as during normal diving.

Key terms9

Emergency Action Plan (EAP)A written, site-specific document that assigns roles and procedures for responding to a dive emergency before diving begins, including emergency contacts, O2 location, and hospital/chamber information.

Rescue breathingProviding ventilations to a non-breathing victim using a pocket mask or bag-valve mask; in diving rescue this begins at the surface while moving the victim to the exit.

Positive buoyancyA state in which a diver or victim floats at the surface without effort, achieved by inflating the BCD and, if necessary, dropping the weight system.

Tank-valve towA rescue tow technique in which the rescuer grips the victim's tank valve from behind and kicks on their back, keeping the victim's airway above water.

Divers Alert Network (DAN)A non-profit dive safety organization that operates a 24-hour emergency hotline for diving accidents and provides guidance on oxygen first aid and transport to hyperbaric facilities.

Hyperbaric chamberA pressurized medical facility used to treat decompression illness and arterial gas embolism by returning ambient pressure to a level that allows nitrogen bubbles or emboli to dissolve safely.

Pocket maskA transparent, one-way-valve face shield used to deliver rescue breaths, protecting the rescuer from direct contact with the victim while creating an effective seal.

Task-loadingThe accumulation of simultaneous mental and physical demands on a diver—such as carrying tools while monitoring depth and a buddy—that can increase error rates and air consumption.

Decompression illness (DCI)An umbrella term covering decompression sickness and arterial gas embolism, both caused by rapid or uncontrolled pressure changes; symptoms may appear minutes to hours after a dive.

In class: Scenario 1 — Tired diver assist: in pool or confined water, student rescuer responds to a simulated tired diver, establishes positive communication, and tows the diver 25 meters to the exit point using a correct tow technique. · Scenario 2 — Unresponsive diver recovery: student locates a submerged unresponsive mannequin or role-play diver at depth, establishes positive buoyancy, surfaces the victim, removes the mask, and begins rescue breathing while moving to the exit—consistent with PADI Rescue Diver scenario requirements. · Emergency action plan (EAP) drill: student teams develop a written Emergency Action Plan for a hypothetical reef restoration dive site, including DAN emergency contact, O2 administration protocol, nearest hyperbaric chamber location, and role assignments, then present it to the class for peer critique.
Materials: Pool or confined-water access, SCUBA and snorkel equipment, rescue mannequin, pocket mask, bag-valve mask, supplemental O2 unit, DAN contact reference card, EAP template, PADI Rescue Diver manual.
Check: Instructor evaluates each rescue scenario against PADI Rescue Diver performance requirements; both scenarios must be performed correctly on first or second attempt. EAP document must include all five required elements.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.