The Royal National Lifeboat Institution (RNLI) is the largest of the lifeboat services operating around the coasts of the United Kingdom, Ireland, the Channel Islands, and the Isle of Man, as well as on some inland waterways.

Founded in 1824 as the National Institution for the Preservation of Life from Shipwreck, it soon afterwards became the Royal National Institution for the Preservation of Life from Shipwreck because of the patronage of King George IV. Royal patronage has continued up to the present day with King Charles III. The organisation changed its name to the Royal National Lifeboat Institution on 5 October 1854 and was granted a royal charter in 1860.

The RNLI is a charity based in Poole, Dorset. It is principally funded by legacies (65%) and donations (30%). Most of its lifeboat crews are unpaid volunteers. They operate more than 400 lifeboats from 238 stations. Paid lifeguards provide services at nearly 250 beaches. The RNLI also provides free safety advice to many different groups of people, and has been involved in international cooperation since 1924.

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