Lundy Island will lose a limb when the RAF Chivenor Sea King is relieved of its duties in October, according to the island manager.In the second of our Thanking North Devons Helicopter Heroes stories, Lundy manager Derek Green has told how the Sea King crew is a part of Lundys DNA. The Search and Rescue (SAR) service is due to move to a brand new base in St Athan, Wales in October, run by private company Bristow Helicopters Ltd for the Coastguard. Derek has seen many Sea King rescues from the island since he took up the post in July 2004 averaging around 12 rescues and eight medical evacuations a year. Saved his lifeBut one incident in particular stands out for him the night the Sea King crew saved his best friends life. Derek said: He had a bad fall from the internal light of the Old Light House onto a hard stone floor. They had to rescue him down a 100ft spiral staircase and get him to hospital as quickly as possible. The crew saved his life.Vital life-lineOver the last 11 years that Derek has worked on the island, he has seen the crew rescue stricken climbers, divers in trouble, fishermen who have run into rocks and members of staff who have had medical episodes. As well as providing a vital life-line, the Sea King crew has also provided a spectacle for visitors and a hand of friendship to those living on Lundy. We will really miss the sight of the helicopter sending the winchman down onto MS Oldenburg, as part of their training, with 200 delighted visitors watching, said Derek. I remember one exercise when they launched the life raft off MS Oldenburg and they winched all 12 members of the coastguard off it. It was an absolutely fantastic experience. Having Chivenor so close has given staying visitors the reassurance of knowing should anything happen, they are only minutes away.Close friendsThe Chivenor crew use Lundy as a training ground several times a week, something Derek fears will be lost when the service switches over. I worry they will lose a lot of local knowledge being based in Wales. It remains to be seen whether they will train at Lundy anymore, he said. Weve had some great times together and the crew have all come over to stay on the island too. Many of them are close friends who I will be very sad to see go. They are a part of Lundys DNA and they have been for a long time.If you have been rescued by the Sea King, or wish to share why you will miss the familiar sight in the sky, contact Sarah Howells by email at firstname.lastname@example.org or call 01271 341658.