Royal Naval Air Service

Initially developed as an anti-submarine helicopter, the Royal Air Force also use Sea Kings for air-sea rescue. Search-and-rescue helicopters, like this one at RNAS Culdrose, Cornwall, are equipped with hydraulic hoists capable of lifting up to 272 kg/600 lb. The cabin can carry up to 22 survivors, or 9 stretchers and 2 medical officers.

Air arm of the British Royal Navy during World War I, formed in July 1914 from naval officers and elements of the Royal Flying Corps.

The RNAS performed patrol duties over the North Sea, pioneered the use of aircraft carriers, and was also responsible for the air defence of Britain until 1916. It pioneered strategic bombing, attacking German airship bases as early as 1914.