The aim of this paper is to describe an autonomous rescue system for marines that integrates an intelligent wearable device in the form of smart swimming goggles equipped with an inertial navigation system, an emergency trigger, and wireless communication, and an autonomous rescue boat to track distressed swimmers and aid them without human intervention. The device keeps a protective boundary of seven meters around a swimmer and has the ability to automatically plot a course for emergencies through doubly validated inertial coordinates. It is able to sense whether or not the swimmer is on board the rescue boat through motion analysis algorithms. The new system is in real-time and does not have delays in rescue responses, which is a problem in conventional rescue systems that involve lifeguards, remotely operated or semi-autonomous rescue boats, and signaling.