Most don't. They carry first-aid, oxygen, AEDs, and sat-phones for evacuation. Larger expedition vessels in remote regions sometimes carry an MD.
Most liveaboards do not carry a dedicated medical doctor on board
The standard model is comprehensive first-aid equipment, oxygen, AED, and crew trained in EFR/CPR/Rescue Diver protocols, combined with rapid evacuation capability via sat-phone, VHF radio and tender boat.
Expedition and luxury exceptions
Antarctic vessels almost always carry an expedition doctor — the remoteness and weather conditions justify the expense. Larger Galápagos and Cocos vessels (40+ guests) sometimes carry a doctor or paramedic. Premium Maldives and Red Sea operators sometimes have an MD on the cruise director team. None of this should be assumed; check at booking if it matters to you.
What is universally on board
Medical-grade oxygen with multiple delivery systems (demand-valve, non-rebreather mask, BVM), AED defibrillator, comprehensive first-aid kit including suture supplies, IV fluids and basic prescription drugs, emergency dive medication kit (analgesics, anti-emetics, oral rehydration), sat-phone for direct contact with DAN/DiveAssure 24/7 medical hotline, VHF radio for tender and shore communication, and EPIRB for full-scale emergency.
What the crew can do
Initial assessment and treatment of dive emergencies (administering oxygen, immobilizing injuries, stabilizing for transport), wound care for reef cuts and stings, basic CPR and AED use until evacuation, coordinating evacuation logistics with the medical hotline. They are not doctors and cannot diagnose serious medical conditions or prescribe controlled medication.
Evacuation logistics
From most liveaboards, evacuation involves transport by tender boat to the nearest port with medical facilities (typically 1–6 hours depending on location), then onward by ambulance or helicopter to a hospital or hyperbaric chamber. The Maldives has chambers in Malé and Bandos. Egypt has chambers in Hurghada, Sharm el-Sheikh and Marsa Alam. Indonesia has chambers in Bali, Manado and a few other locations. Galápagos and Cocos require evacuation to mainland Ecuador or Costa Rica, which can take 12–24 hours.
What this means for you
Bring all your prescription medication in original labeled containers, with extra doses in case the trip extends or your luggage is lost. Bring a personal first-aid kit with what you specifically need — pain relievers, anti-diarrhea, antihistamines, sunscreen, after-bite, blister plasters. Disclose pre-existing medical conditions on the operator's medical form before booking. Travel and dive insurance with evacuation cover is mandatory; don't sail without it.
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