APPLEDORE'S RNLI lifeboat is to be featured on a brand new set of Royal Mail stamps.The all-weather George Gibson appears as part of the special edition six-stamp set, Mayday - Rescue at Sea, available to buy from March 13.It is the first time the charity has been featured on a UK stamp for more than 20 years.Martin Cox, RNLI Coxswain at Appledore, said the crew was delighted that the station's Tyne class boat was to appear on the 46p stamp."Last year we launched the George Gibson on 17 occasions to emergency call-outs anywhere between Morte Point and Morwenstow, and half way across to Wales - each time with a crew of volunteers," he said."Conditions can be miserable, and often we're called out when everyone else has had the sense to stay ashore. "This stamp is a way of reminding people about the work our charity does, and the incredible dedication and bravery of the many volunteers who keep our lifeboats afloat."The stamps - which will run to more than 30 million and also feature lifeboat crews based at St Ives, Cornwall, Tenby in Wales, and Barra in Scotland - also mark the centenary of the adoption of the SOS distress signal.The Royal Mail has worked with printers to develop special square perforation pins that re-create the famous sequence of "dots" and "dashes" along the top and bottom edges of the stamps.Appledore lifeboat station will receive a donation from any stamps and first day covers sets sold at the station.