Marine Medical Kit Essentials for Coastal Cruising

An exposed cotter pin can slice your leg when you reach for a dock line. A rolling boat can spill boiling water onto a hand. A guest can stub and break a little toe on a deck cleat. These are common incidents aboard pleasure craft, and being prepared with the right supplies and knowledge can make the difference between a minor inconvenience and a medical evacuation.

Why a Marine Medical Kit Matters

For weekend or extended coastal cruising, your onboard medical kit should allow the crew to provide appropriate initial care for typical marine injuries and illnesses until professional help is available. Proximity to medical facilities is the main factor that determines what you need. If you are within about 12 hours of care—as most coastal cruisers are—your kit will look different than if you plan to head to remote anchorages or offshore passages. The same types of problems occur in both settings; the farther you are from help, the more extensive your supplies should be.

Goals and Training

The objective is to increase self-reliance, prevent minor issues from becoming major, and avoid unnecessary high-risk evacuations for problems that can be managed onboard. Formal first-aid, CPR, or wilderness/marine medicine courses will raise your competence and confidence. At a minimum, keep a reliable marine medicine reference on board and be familiar with how to use it.

Separate Crew Medical Kit

Keep a small, easily accessible crew medical kit stocked with common-use items. A separate crew kit encourages early treatment, ensures faster access during an emergency, and preserves the organization and inventory of the primary ship’s medical kit.

Allergies and Anaphylaxis

If any crewmember has a history of severe allergic reactions, include epinephrine auto-injectors in the crew kit and ensure multiple people on board know how to use them. Store them according to the manufacturer’s recommendations and replace them before expiration.

Trauma and Wound Care

After seasickness, wounds are among the most frequent medical issues at sea. Proper cleaning and dressing are essential—closing a wound may be optional in some cases, but leaving it untreated is not. Waterways are full of bacteria and other microbes; inadequate wound care can easily lead to serious infections.

Recommended wound-care items

Nitrile examination gloves
Lidocaine or topical anesthetic wipes
Povidone-iodine or other antiseptic for irrigation
20 cc syringe for wound irrigation
Tincture of benzoin swabs to help adhesive dressings stick

Assorted sterile and non-sterile gauze pads, non-adherent dressings

Conforming roll gauze and self-adhering elastic bandages

Waterproof medical tape

Small tweezers for splinter and tick removal

Hydrogel burn dressings for scalds and hot-liquid burns

Fractures and Sprains

Fractures and sprains happen frequently on boats. A foam-padded aluminum SAM splint is versatile and can be molded to stabilize most injured limbs. Use a compression elastic bandage to secure it. Small finger and toe splints are useful for those common, painful injuries. Proper splinting reduces pain and helps protect nerves, vessels, and muscles from further damage.

Activity-Specific Additions

Customize the ship’s main kit to match planned activities. For snorkelers and scuba divers, include ear-drying solutions and saline for swimmer’s ear. If you expect remote cruising, expand supplies, training, and decision-making resources accordingly.

Medications and Antibiotics

When within 12 hours of medical care, it is generally unnecessary to carry a broad stash of oral antibiotics. Some cruisers do keep a limited, clearly labeled supply for starting treatment of uncomplicated infections—only if someone aboard knows when and how to use them. Always follow prescribing guidance and legal regulations for prescription medications.

Resuscitation and Drowning

A CPR face shield should be part of every marine kit. It helps with rescue breathing and can reduce exposure to infectious fluids. Take an up-to-date CPR and rescue course—drowning remains a leading cause of death among boaters, and trained hands improve outcomes.

Prescription Medications and Storage

When bringing personal prescriptions, select medications that don’t increase sun sensitivity when possible, and check their temperature stability. Medicines exposed to extremes of heat or cold may lose potency; follow storage instructions and replace expired items.

Many boaters find it convenient to start with a commercially available marine medical kit and supplement it to suit their vessel, crew, and itinerary. Whatever you carry, the most important factor is knowing how to use the supplies and having at least one person trained to apply them.

This story originally appeared in the January 2009 issue.

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