Lifeboat
Fast, rugged, and powerful motorised lifeboats have been used to perform sea rescues since the late 19th century. These lifeboats are typically 30 to 80 feet (9 to 24 m) in length and designed to right itself if overturned. Such boats carry life-saving equipment and crew trained in first aid methods specific to sea rescue.
The principles of coordinating small surface boat rescue efforts with direction and assistance from air units were developed in the 1930s by Germany, followed by other nations in the 1940s. A wide variety of powered boats have been used for air-sea rescue, including ones such as minelayers, torpedo boats and fast attack boats that were not developed specifically for rescue.
Read more about this topic: Air-sea Rescue