Medical emergencies on passenger vessels are inherently unpredictable, and seizures are among the more common neurological events crew members may face. The sight of a passenger experiencing a seizure can be distressing, but a calm, informed, and systematic response forms the bedrock of effective care. This expanded guide provides comprehensive protocols for vessel crew members, covering recognition, immediate intervention, post-seizure management, documentation, training, and long-term preparedness. Following these steps protects the individual, upholds the vessel’s duty of care, and preserves order for other passengers.

Understanding Seizures: Causes, Types, and Triggers

A seizure results from an abnormal, excessive electrical discharge within the brain. This disruption can produce symptoms ranging from a momentary lapse of attention to full-body convulsions and loss of consciousness. Understanding the underlying mechanisms helps crew members anticipate needs and avoid common mistakes.

Common Seizure Types

  • Generalized tonic‑clonic seizures – Formerly called grand mal, these involve stiffening (tonic phase) followed by rhythmic jerking (clonic phase), often with loss of consciousness and postictal confusion.
  • Focal seizures – Also known as partial seizures, they affect only one part of the brain and may cause unusual sensations, automatic movements, or impaired awareness. The passenger may appear confused or wander aimlessly.
  • Absence seizures – Brief episodes of staring or “zoning out,” most common in children. The passenger may not respond for a few seconds and then resume normal activity.
  • Psychogenic non‑epileptic seizures – Not caused by abnormal electrical activity but by psychological stress; they can resemble epileptic seizures but require different management. Crew should treat as a medical event until a diagnosis is known.

Potential Triggers

Triggers vary by individual but can include:

  • Missed or incorrect dosing of anti-epileptic medication
  • Sleep deprivation or fatigue, common during long voyages or time zone changes
  • Fever or infection, especially in young children (febrile seizures)
  • Flashing lights or strobe effects (photosensitive epilepsy)
  • Alcohol withdrawal or intoxication
  • Electrolyte imbalances from seasickness, dehydration, or diarrhea
  • Stress, excitement, or sudden loud noises

Knowledge of these triggers allows crew to identify at-risk passengers during boarding and to adjust the environment when possible, such as dimming flickering lights in public areas.

Recognizing a Seizure

Early recognition allows for faster intervention and reduces the risk of injury. Signs may appear suddenly or build over seconds. Key indicators include:

  • Sudden loss of consciousness or unresponsiveness
  • Uncontrolled jerking or stiffening of limbs, often unilateral or bilateral
  • Twitching of facial muscles, eye rolling, or fixed gaze
  • Drooling, foaming at the mouth, or biting the tongue (causing bleeding)
  • Breathing irregularities – shallow, noisy, or temporary cessation (apnea)
  • Skin color changes – paleness or bluish tint (cyanosis) around the lips
  • Confusion, staring, or repetitive, purposeless movements before the event (aura)
  • Loss of bladder or bowel control

If a passenger appears to be “spacing out” or making strange, repetitive gestures, do not disregard it. Document the observation and stay nearby until you are certain the episode has passed. Some seizures, particularly focal seizures, may be mistaken for intoxication or dementia. Always assume a medical cause first.

Immediate Response Steps

When a seizure begins, crew members must act without panic. Follow this sequence for maximum safety:

Clear the Area

Quickly remove nearby furniture, luggage, sharp objects, or hot items that could cause injury. Ask other passengers to move back at least two meters. Do not crowd the person; a clear perimeter reduces both physical risk and psychological distress for the passenger and onlookers. If the seizure occurs in a dining area, remove hot beverages and utensils immediately.

Protect the Head and Body

If possible and without restraining movements, place a soft object—such as a folded life jacket, cushion, rolled blanket, or even a thick sweater—under the passenger’s head. Do not hold the person down or try to stop their movements. Forcing limbs against resistance can lead to fractures, dislocations, or muscle tears. Allow the seizure to run its course naturally. If the passenger is lying on a hard surface, gently slide a soft item beneath their head using a side approach.

Position for Airway Safety

After the initial stiffening phase (tonic) gives way to jerking (clonic), gently roll the passenger onto their side (recovery position) if you can do so without force. This helps saliva drain and prevents the tongue from obstructing the airway. If the person is still rigid, wait a moment and try again. Do not attempt to open their mouth or force the head back. If the passenger is lying face down, turn them onto their side carefully.

Time the Seizure

Look at a watch, phone, or cabin clock and note the exact start time. Seizures that last longer than five minutes are considered prolonged and require immediate advanced medical care. Also note the end time, even if it is a brief episode, as recurrent seizures may occur. Use a stopwatch if available and assign a crew member to track time.

Do Not Insert Objects

Never try to place anything between the passenger’s teeth. Bite injuries and broken teeth are common, and forcing an object in can obstruct the airway, cause choking, or lead to aspiration of debris. The belief that a person can swallow their tongue is a myth; the tongue is attached at the back of the throat and cannot be swallowed.

Do Not Offer Food or Drink

During or immediately after a seizure, the passenger cannot swallow safely. Offering water, pills, or snacks risks aspiration into the lungs. Wait until the person is fully alert and oriented before offering any oral intake. Even then, start with small sips of water and observe for coughing.

Call for Medical Back‑Up

Notify the ship’s medical team or the designated emergency contact as soon as the seizure begins if you are alone, or delegate a crew member to call immediately. Provide clear details: location, passenger’s condition, seizure type observed, and timing. If the seizure lasts more than two minutes, call again to escalate. Ensure the bridge is notified so the vessel can be prepared for a potential diversion or medical evacuation.

Post‑Seizure Care

After the convulsions stop, the passenger enters the postictal phase, which can last minutes to hours. During this time they may be:

  • Confused, drowsy, or disoriented to place and time
  • Headache‑ridden or nauseous
  • Unable to speak or remember what happened (amnesia for the event)
  • Restless, agitated, or combative
  • Incontinent of urine or stool
  • Exhausted and falling asleep

Stay with the passenger and speak calmly. Repeat simple statements: “You are safe. You had a seizure. Help is on the way.” Do not ask them to perform tasks or answer complex questions. Re‑orient them by naming the ship, the location, and the approximate time. If they become agitated, give them space but remain nearby; avoid prolonged physical contact unless necessary to prevent injury.

Monitor Vital Signs

Check respiration, pulse, and level of consciousness every few minutes. Note any changes in breathing, skin color, or responsiveness. If breathing stops, begin CPR immediately and continue until medical help arrives. Seizures rarely cause cessation of breathing on their own, but it can happen in prolonged episodes or if the airway becomes obstructed. Monitor for signs of cyanosis and be ready to administer oxygen if trained.

Document the Incident

As soon as the situation stabilizes, record the following details in the ship’s medical log or incident report form:

  • Date, time, and exact location of the seizure
  • Duration of seizure (start and end times)
  • Description of movements (type, side of body affected, whether it was symmetrical)
  • Any aura reported by the passenger beforehand
  • Injuries sustained during the seizure (e.g., tongue bite, bruise, head bump)
  • Postictal symptoms and their duration
  • First aid measures taken, including any positioning or clearing of hazards
  • Name and contact of responding crew
  • Time when medical team was called and arrived
  • Any medications administered (if within standing orders)

Photographs of visible injuries may be taken with the passenger’s consent for medical records. All documentation should be factual, objective, and free of assumptions about cause.

When to Seek Medical Help

While many seizures are self‑limiting, certain situations mandate urgent escalation. Crew should summon the ship’s physician or emergency medical team if any of the following occurs:

  • The seizure lasts longer than five minutes (status epilepticus) – this is a life‑threatening emergency.
  • Multiple seizures occur without the passenger regaining consciousness in between (recurrent seizures).
  • The person does not wake up or becomes increasingly unresponsive after the seizure ends.
  • The passenger is injured – for example, a head strike, deep laceration, or possible fracture.
  • The seizure occurs in water, on stairs, or in another hazardous location where trauma is likely.
  • The individual is pregnant – seizures during pregnancy can indicate eclampsia, a life‑threatening condition requiring immediate hospital care.
  • The passenger has diabetes – a seizure may be caused by severe hypoglycemia requiring immediate glucose administration.
  • This is the first‑ever seizure for that person – an underlying cause needs evaluation and diagnosis.
  • The passenger has a known medical condition (e.g., brain tumor, recent stroke, infection) that could be worsening.
  • There is difficulty breathing or signs of prolonged cyanosis.

When in doubt, err on the side of caution. Ship’s medical personnel are trained to assess and stabilize; they can coordinate with onshore physicians if a port evacuation is necessary. Even after a brief, uncomplicated seizure, it is advisable for the passenger to be evaluated by medical staff to rule out complications.

Medical Documentation and Reporting

Thorough documentation is not only a clinical requirement but also a legal safeguard. Many maritime authorities, including the International Maritime Organization (IMO), recommend standardized incident forms. Essential elements to include:

  • Passenger’s full name, cabin number, date of birth, and relevant medical history (epilepsy, diabetes, pregnancy, etc.) if obtainable
  • Witness statements from crew or other passengers, signed and dated
  • Photographs of any obvious injuries (with consent from the passenger or traveling companion)
  • Record of vital signs (pulse, respiratory rate, blood pressure, oxygen saturation if available) and interventions performed
  • Communication logs with the bridge, medical team, and any external shoreside responders
  • Medication administered (if permitted under the vessel’s medical standing orders), including drug name, dose, route, and time
  • Any instructions given by the ship’s doctor or telemedical support

If the passenger is transferred to a shoreside facility, provide a copy of the report to the receiving medical team. This ensures continuity of care and helps the passenger’s personal physician follow up. Keep a copy in the vessel’s medical log for regulatory review.

Crew Training and Drills

Written procedures are only as effective as the people who execute them. Routine drills and training sessions ensure that crew members can respond competently and without hesitation. Key training components include:

First Aid for Seizures

All crew should complete a basic first aid course that covers seizure recognition, recovery position, airway management, and when to activate emergency services. The American Red Cross and St John Ambulance offer maritime‑specific modules. Training should be hands-on, with mannequins and role-playing scenarios.

Tabletop Scenarios

Conduct regular scenario‑based exercises where crew practice coordinating responses. For example: a passenger collapses in the dining room, begins convulsing, and has a history of epilepsy. Crew must assign roles: one to call medical, one to clear tables, one to protect the head, and one to time the seizure. Debrief after each drill to identify gaps in communication or action.

Annual Refresher and Induction

Review protocols annually, as medical guidelines evolve. Ensure new joiners receive seizure response training during their induction. Keep a printed quick‑reference card in the bridge, medical locker, and common crew areas. Consider posting a laminated flowchart in high-traffic crew zones.

STCW Compliance

The STCW Code (Standards of Training, Certification, and Watchkeeping) requires that crew are trained in elementary first aid, including management of unconscious casualties and seizures. Vessels operating internationally must meet these standards. Include seizure management in upcoming STCW refresher courses.

Communication Protocols

Clear, calm communication during a seizure emergency reduces confusion and speeds up response. Establish the following chain:

  • First responder: Stays with the passenger, initiates basic care, and orders other crew to call for help and clear the area. The first responder does not leave the passenger unless absolutely necessary.
  • Bridge communication: The crew member calling the bridge should state: “Medical emergency, seizure, location [deck/area], passenger unresponsive/convulsing. Request immediate medical team.” The bridge then announces a code or pages the medical staff and logs the time.
  • Passenger announcements: If necessary, make a discreet announcement over the PA system asking any medical professionals onboard to report to the location. Avoid alarming phrases; use “Medical team, please proceed to…” rather than “Emergency on deck 4.” Maintain a calm, professional tone.
  • Aftercare communication: Once the seizure ends and the medical team provides a prognosis, the captain or purser should update the passenger’s traveling companions and, if needed, next of kin. Provide reassurance and explain what happened in simple terms, respecting passenger privacy.

If language barriers exist, use the vessel’s multilingual phrase cards or involve a crew member who speaks the passenger’s language. Document all communications verbatim if possible.

Special Considerations

Children

Febrile seizures can occur in young children during high fevers. Treat as above but ensure the child is kept cool and remove excess clothing. Always notify the ship’s doctor, as febrile seizures can be a sign of a serious infection such as meningitis. Monitor temperature and administer antipyretics only as directed by the medical team. Reassure parents calmly.

Elderly Passengers

Older adults are more prone to falls and fractures during seizures. Protect the head and neck extra carefully by using additional padding. Be aware that seizures in the elderly may be caused by electrolyte disturbances, medication interactions, or an underlying stroke. The postictal phase may be prolonged, increasing the risk of confusion and wandering.

Passengers with Dementia or Mental Health Conditions

Postictal confusion can be prolonged in individuals with cognitive impairment. Reassure them softly and provide a quiet, familiar environment if possible. Avoid restraints, as they may escalate distress. Use short, simple sentences and avoid complex instructions. If the passenger becomes aggressive, maintain a safe distance and wait for medical personnel.

Seizures in Water or Near Hazards

Pool decks, stairwells, and side decks present unique dangers. If a seizure occurs near water, immediately pull the passenger away from the edge using a long object (e.g., a pole) or a life ring. If they fall into the water, activate man‑overboard procedures and retrieve them as quickly as possible – but never jump in yourself unless trained rescue personnel are available and you are wearing a life jacket. Once retrieved, treat for potential drowning or hypothermia in addition to seizure management.

Pregnant Passengers

Seizures in pregnancy are a medical emergency. Eclampsia is a leading cause of maternal death. Place the passenger in the recovery position on her left side to improve blood flow to the placenta. Do not administer any medication without direct orders from a physician. Transfer to a hospital as soon as possible.

Passengers with Diabetes

Hypoglycemic seizures require immediate glucose. If the ship’s medical team is not present, administer glucagon if trained and authorized. Check the passenger’s blood glucose if a monitor is available. Document the levels and response.

Vessel operators have a duty of care toward passengers. Failure to provide prompt, appropriate medical attention can lead to liability claims under maritime law. Crew should always act within their scope of training. Administering medication beyond a vessel’s medical protocols may be legally risky unless a doctor is present. Documenting every action protects both the crew member and the company.

International maritime law, including the IMO guidelines and the STCW Code, require that crew are trained in elementary first aid. For passenger vessels, medical‑grade equipment and trained medical staff are often mandated under the International Convention for the Safety of Life at Sea (SOLAS). Consult your flag state’s regulations and the vessel’s own Safety Management System (SMS) for specific obligations regarding medical care and incident reporting.

In the event of a serious incident, preserve all evidence, including witness statements, video footage (if available and permitted by privacy laws), and communication logs. Cooperate fully with any investigation by maritime authorities or coast guard.

External Resources for Crew Training

To deepen knowledge, the following reputable sources provide detailed seizure‑response materials and maritime medical guidelines:

Conclusion

Seizures on board a vessel can be managed effectively when crew members are prepared, calm, and guided by clear protocols. By understanding seizure types, acting swiftly to protect the passenger, timing the event, and documenting thoroughly, crews can minimize harm and ensure the best possible outcome. Regular training, proper equipment, and a culture of readiness turn a potentially chaotic situation into a controlled, professional response. Every seizure is different, but the core principles remain: protect, observe, report, and reassure.

Remember that a seizure is a medical event, not a behavioral one. Treat the passenger with dignity and discretion. With these expanded guidelines, you are equipped to handle this challenging emergency confidently and compassionately, upholding the highest standards of maritime care and safety.