Safety · Health on board

First aid on board: what you need to know

The first aid kit, sunburn, dehydration, seasickness and what to do if there is a serious injury far from port.

Ricard Prehn, professional skipper and yacht captain Updated 29 September 2026 3 min

Spanish Maritime Rescue boat in the port of Barcelona

At sea, you are your own doctor. A small cut, a bad sunburn or persistent seasickness can ruin the day (or the passage). Knowing what your regulation first aid kit contains and how to act is part of being a skipper. Get your kit ready!

  • The regulation first aid kit depends on the navigation zone (zone 5 or 4).
  • Minimum contents: bandages, sterile gauze, antiseptics (chlorhexidine or hydrogen peroxide), tape, seasickness tablets, painkillers and material for heatstroke.

Sunburn and dehydration

The sun at sea is stronger. Dehydration is a constant risk. Drinking water regularly and using high-protection sunscreen is essential.

Seasickness

Seasickness is not cured, it is prevented. The person should look at the horizon, get fresh air and, if needed, take medication before sailing, following the leaflet or a pharmacist’s advice.

What to do in case of a serious injury

If it is a serious emergency (fracture, deep wound), stabilise the casualty, call Spanish Maritime Rescue immediately (VHF channel 16 or 112) and give your exact position.

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