No ships spotted the rubber dinghy and they drifted alone in an open boat.

CNN: Miraculous survivors: Why they live while others die

It explains what to do if caught on a sinking ship or in a depressurised aircraft, how to sleep in space, and how best to survive if caught outdoors in extreme heat or cold, or in an open boat.

ECONOMIST: The science of survival

Growing up in South Florida, it had become an annual ritual to travel by small boat across nearly 100 miles of open ocean to be in the Abacos at the beginning of August, when the Bahamas opens a "sport season" during which visitors are allowed to hunt the spiny lobster that live in and under the coral reefs and outcroppings in its shallow waters.

BBC: Lobster diving in the Abacos