Megayachts carry cool toys, and not just helicopters and submarines. There are many devices and services that average boaters may not know about – and one of them is telemedicine.

Telemedicine is a subscription service that gives you access to doctors specializing in areas from orthopedics to endocrinology; medical consultation is available 24 hours a day. No matter what kind of problem you encounter at sea, pick up the phone in your pilothouse, and a voice on the other end of the line gives you step-by-step instructions to follow for splinting a leg, stopping bleeding or treating other maladies.

The services offered by World Clinic, Maritime Medical Access, and MedLink are comprehensive – and they start at prices that might make everyday boaters flinch. Services at World Clinic, for example, start at $8,000 a year for one couple on one boat. That includes 24-hour access to doctors worldwide; a medical locker and onboard pharmacy; medical evacuation insurance, if you're overseas; compilation of your medical records, so you can become a patient in their practice; and a listing of doctors that you can seek out in person, depending on your cruising itinerary.