Introduction: Understanding the Criticality of Unresponsive Crew Emergencies

A ship is an isolated environment where medical resources are limited and emergency medical services (EMS) can be hours or days away. When a crew member becomes unresponsive, every second counts. The term "unresponsive" can describe a spectrum of conditions, from fainting or severe intoxication to cardiac arrest, stroke, or drowning. The ability to recognize the situation, initiate basic life support, and coordinate a ship-wide response can dramatically improve the chance of survival and reduce long-term harm. This expanded guide provides a detailed, practical approach to handling an unresponsive crew member, covering assessment, intervention, equipment, communication, documentation, and the ongoing training needed to keep the crew prepared. Maritime regulations such as the International Maritime Organization (IMO) STCW Convention require that seafarers be trained in elementary first aid and medical care, and this article builds on those foundational requirements.

Immediate Assessment and Response

Scene Safety and Personal Protective Equipment

Before approaching an unresponsive person, ensure the area is safe. Hazards on a ship may include electrical faults, toxic fumes, slippery surfaces, moving machinery, or confined spaces with oxygen deficiency. Do not become a second victim. Use personal protective equipment (PPE) such as gloves and, if available, a face shield or pocket mask for rescue breaths. If the environment is unsafe, move the crew member only if necessary to preserve life (e.g., away from a fire or toxic gas), following safe handling techniques to avoid aggravating spinal injuries.

Check Responsiveness and Summon Help

Approach the person and gently shake their shoulders or rub the sternum while shouting. If they do not respond by speaking, moving, or opening their eyes, they are unresponsive. Immediately call loudly for help—activate the ship’s emergency alarm system or use a walkie-talkie to alert the bridge and the designated medical officer. The International Medical Guide for Ships (WHO) recommends that every vessel have a clear protocol for calling "Code Blue" or its equivalent. In parallel, assign someone to bring the emergency medical kit and automated external defibrillator (AED).

Activate the Ship’s Emergency Plan

Every vessel should have a pre-established emergency response plan that designates roles. The officer on watch should notify the master, log the time, and maintain a communication log. If the incident occurs at sea, the ship may need to broadcast a medical emergency through Inmarsat or satellite phone and request telemedical assistance (TMAS). The team should prepare for possible diversion or medevac if the condition does not improve.

Basic Life Support (BLS) Aboard a Ship

Cardiopulmonary Resuscitation (CPR) Protocol

If the person is not breathing normally and has no pulse (or you are unsure), start CPR immediately. Place them on a firm, flat surface—preferably a deck or a resuscitation board if available. For a maritime setting, the recommended compression‑to‑ventilation ratio for adults is 30 compressions followed by 2 breaths (or continuous compressions if you are untrained). Key points include:

  • Compression depth: at least 5 cm (2 inches) for adults, with full chest recoil between compressions.
  • Compression rate: 100–120 compressions per minute (e.g., to the beat of "Stayin' Alive").
  • Rescue breaths: each breath delivered over one second, producing visible chest rise. Use a barrier device.
  • Minimize interruptions—limit pauses in chest compressions to less than 10 seconds.
  • Continue CPR until the person shows signs of life, professional medical help takes over, or the responder is exhausted and relief arrives.

For crew working in hot engine rooms, consider that hyperthermia may increase the risk of sudden cardiac arrest. Good ventilation and cooling measures should be part of the response. In cold environments, hypothermia slows metabolism, and prolonged CPR (up to two hours in extreme scenarios) may be indicated. Follow the European Resuscitation Council or American Heart Association guidelines adapted for maritime use. View current CPR guidelines from the American Heart Association.

Using an Automated External Defibrillator (AED)

An AED is a vital piece of shipboard equipment. Modern AEDs are rugged, waterproof, and user‑friendly. As soon as it arrives, turn on the device and follow its voice prompts. Steps include:

  • Expose the victim’s chest and dry it if wet—salt water can reduce efficiency.
  • Apply the pads as illustrated on the pads: one on the upper right chest, the other on the lower left side.
  • Ensure no one is touching the victim while the AED analyzes the heart rhythm.
  • If a shock is advised, clear the area and press the shock button. Immediately resume CPR after the shock.
  • If no shock is advised, continue CPR immediately.

Ships operating in remote areas should have AEDs placed in common areas (mess room, bridge, engine control room) and their batteries checked monthly. The IMO’s guidelines on medical first aid emphasize that early defibrillation is the single most important factor in survival from ventricular fibrillation.

Rescue Breaths and Airway Management

If you are trained and willing to give rescue breaths, follow these additional steps:

  • Open the airway using the head‑tilt chin‑lift maneuver (or jaw‑thrust if a spinal injury is suspected).
  • For rescue breathing, use a pocket mask or bag‑valve‑mask (BVM) with high‑flow oxygen if available.
  • Provide two breaths after every 30 compressions. Each breath should last about one second and make the chest rise visibly.
  • If the chest does not rise, reposition the head and ensure a good seal; check for airway obstruction.
  • Foreign body obstruction in an unresponsive person requires abdominal thrusts or chest thrusts if the person is pregnant or very large.

Managing Common Causes of Unresponsiveness at Sea

Cardiac Arrest

Cardiac arrest is the leading medical cause of death among seafarers. Warning signs such as chest pain, shortness of breath, or dizziness may precede collapse. However, many crew members present with sudden collapse. Immediate CPR and defibrillation are the only interventions that restore a perfusing rhythm. After return of spontaneous circulation, place the person in the recovery position, monitor breathing, and arrange for urgent evacuation.

Drowning or Near‑Drowning

Drowning incidents occur during man‑overboard situations, immersion accidents, or work near open water. Unresponsive drowning victims often have hypothermia and may have aspirated water. Take the following measures:

  • Remove the person from the water carefully using a rescue sling or basket; avoid neck movement.
  • Start CPR immediately. If only one rescuer, use chest compressions alone initially, but rescue breathing is especially important in drowning because respiratory arrest precedes cardiac arrest.
  • All drowning victims should receive supplemental oxygen as soon as it is available.
  • Even after recovery, all drowning victims need medical evaluation for secondary infections or lung injury. WHO drowning prevention resources provide context on global risk factors.

Hypothermia and Hyperthermia

Ships traverse extreme climates. Hypothermia can render a crew member unresponsive after prolonged exposure to cold water or wind. Symptoms include confusion, shivering that stops, and loss of consciousness. Avoid rough handling that could trigger cardiac arrhythmia. Rewarm the person gradually with blankets and warm (not hot) packs in the armpits and groin. Hyperthermia (heat stroke) presents with hot, dry skin and altered mental status. Aggressive cooling and fluid replacement are critical. Recognize that both conditions require evacuation, but the immediate BLS approach remains the same: check breathing and circulation, start CPR if needed, and correct the environmental cause.

Medical Conditions: Stroke, Diabetic Emergency, Seizures

An unresponsive crew member may have suffered a stroke (FAST: face drooping, arm weakness, speech difficulty), diabetic hypoglycemia, or a prolonged seizure. For hypoglycemia, if a glucometer is available, check blood sugar. Administer oral glucose only if the person is conscious and can swallow; otherwise, injectable glucagon (if trained) is preferred. For a seizure, protect the head from injury but do not restrain the person; time the seizure and call for medical advice. For suspected stroke, note the time of symptom onset, and keep the person nil by mouth. All these conditions require rapid referral to a ship’s medical officer and external medical consultation.

Medical Equipment and Supplies on Board

First Aid Kit Essentials

International regulations require ships to carry a medical chest that includes supplies for initial management of an unresponsive patient. Key items include:

  • Pocket mask or resuscitation face shield (multiple sizes).
  • Bag‑valve‑mask (BVM) with oxygen reservoir.
  • Oropharyngeal airways (sizes 0–4) and nasopharyngeal airways.
  • Suction unit (manual or battery‑powered).
  • Spine board or cervical collar for immobilization.
  • Glucose test strips and glucagon injectable.
  • Automated external defibrillator (AED) with adult and pediatric pads.
  • Emergency blankets and heat packs.

AED Placement and Maintenance

The location of AEDs should be marked with clear signage. They should be mounted in accessible areas free from salt spray and extreme heat. Monthly checks include verifying battery status, pad expiration dates, and that the device is in good condition. After each use, download the cardiac rhythm data for review and replace pads and batteries as needed.

Oxygen Therapy and Suction Units

Oxygen is often the first drug for an unresponsive patient. Ships should carry medical oxygen cylinders with a regulator and a non‑rebreather mask. High‑flow oxygen (10–15 L/min) should be administered to all unresponsive patients with suspected hypoxia. Suction devices are essential for clearing the airway of vomit, blood, or secretions.

Communication and Coordination

Internal Communication Protocols

A clear chain of command ensures that help arrives quickly. The designated emergency response team should be notified via an all‑ships broadcast or specific pager system. A runner should be sent to the bridge while others prepare the medical space. The bridge team must log all events and maintain contact with the responding personnel. If the person is in a remote compartment, a stretcher team should be organized with proper lifting techniques.

Telemedical Assistance (TMAS)

Many shipping companies subscribe to a telemedical service (e.g., through Inmarsat or dedicated telemedicine providers). The doctor on call can guide BLS, advise on medications, and help decide if evacuation is necessary. Always relay accurate patient information: age, known medical history, medications, events leading to unresponsiveness, and vital signs (if obtainable). Write down the advice and follow it precisely. IMO’s guidelines on medical care at sea stress the importance of telemedical consultation.

Medevac Procedures

If the unresponsive crew member does not improve or has a high‑risk condition (e.g., suspected stroke, cardiac arrest with ROSC, status epilepticus), a medical evacuation (medevac) may be necessary. The master should coordinate with the nearest coast guard or rescue coordination center, providing the ship’s position, weather conditions, and patient status. Prepare the person for transfer with a spine board, IV access if possible, and continuous monitoring. Document all medications and interventions provided before evacuation.

Documentation and Reporting

Incident Reporting Requirements

After the initial response, the master or medical officer must complete an incident report. This should include:

  • Date, time, and location of the incident.
  • Names and roles of witnesses and responders.
  • Chronology of events and actions taken.
  • Vital signs, response to treatment, and any AED rhythm strips or defibrillation times.
  • Communication with medical advisors and their recommendations.

Most flag states require that a formal report be submitted under the ship’s safety management system (SMS) and possibly reported to the flag state or port state authorities if it involves a serious injury or death.

Medical Records and Logs

An individual medical record should be updated for the crew member. This record stays with the person and is used by subsequent healthcare providers. Include a summary of the emergency, treatment provided, and any ongoing medications or restrictions. The medical log on board must also note the incident, equipment used, and any consumables (oxygen, AED pads) that need restocking.

Good documentation protects the crew and the shipowner. It shows that the standard of care was followed. If a death occurs, the incident report may be used in a maritime board of inquiry or coroner’s report. All crew members who provided care should be debriefed and offered psychological support. The ship’s insurer (P&I Club) should be notified according to company policy. USCG Medical Manual guidelines on sick and injured mariners provide additional context on reporting obligations.

Training and Drills

Regular CPR and First Aid Training

Every crew member should receive refresher training in CPR and AED use at least every two years, as required by STCW. Hands‑on practice on mannequins is far more effective than passive lectures. Include scenarios specific to the ship’s environment: confined‑space rescue, hot‑engine‑room collapse, and wet‑deck drowning. Use real‑time feedback devices to improve compression quality.

Emergency Drills: Unresponsive Crew Scenarios

Incorporate unresponsive crew member drills into monthly emergency exercises. Examples:

  • Engine room: a crew member collapses near a hot engine with a suspected electrical burn. The team must move the victim safely, start CPR, and use the AED while the engine is shut down.
  • Galley: a chef collapses with anaphylaxis after eating shellfish. The drill tests the use of epinephrine auto‑injectors (if available) and airway management.
  • Man‑overboard: the person is recovered unresponsive and hypothermic. The team must perform CPR on a wet deck, protect the airway, and coordinate medevac.

After each drill, conduct a debrief to identify gaps and update the procedures. Use a checklist to ensure all steps (scene safety, call for help, BLS, AED, communication, documentation) are completed correctly.

Psychological Preparedness and Peer Support

Emergency responders on a ship are also crewmates, and witnessing a serious medical event can cause stress, guilt, or moral injury. Pre‑training should include psychological first aid techniques. Establish a buddy system and ensure that all responders have access to confidential support after the event. The ship’s welfare officer or master should follow up with the affected crew members and the person who recovered. If a death occurs, the ship should have a protocol for mental health support until the vessel reaches port.

Conclusion: Building a Culture of Preparedness

An unresponsive crew member represents one of the most time‑sensitive and stressful emergencies a ship can face. The difference between a positive outcome and a tragedy often hinges on the first few minutes: rapid recognition, effective BLS, early defibrillation, and a well‑coordinated team response. This expanded guide has covered the core elements of assessment, intervention, equipment, communication, documentation, and training. By integrating these practices into daily operations and regular drills, shipping companies can ensure that their crews are ready to save lives, even in the most remote waters. Continuous improvement—based on debriefs, new guidelines, and lessons learned—keeps the safety culture alive and reinforces the principle that every crew member is a potential first responder. The WHO International Medical Guide for Ships (3rd edition) remains an essential reference for all maritime medical officers and should be consulted for updates and detailed drug protocols.