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4 Oil Drillers Dead Helicopter Drops Into North Sea Shetland Ocean 12 Oil Rig Workers Rescued. Police have named the four people who died after a helicopter carrying oil workers ditched into the sea on its way to Shetland. The victims are: Duncan Munro, 46, from Bishop Auckland; Sarah Darnley, 45, from Elgin; Gary McCrossan , 59, from Inverness; and George Allison, 57, from Winchester. The Super Puma L2 went down at approximately 6.27pm on Friday, around two miles west of Sumburgh airport as it was returning to Shetland from the Borgsten Dolphin platform. The helicopter was carrying 16 workers and two crew. It has also suspended flights in Aberdeen "as a mark of respect". Amanda Smith, the mother of one of the workers, Sam Smith, said that her son had telephoned her from hospital after suffering cuts in the crash. She told Sky News: "He said it seemed to lose power and there was no time to brace, they just dropped into the sea. "He was by the window so he was able to escape that way as it rolled over. "He said he had come off better than a lot of people. It didn't seem real, I would say two hours later it's just beginning to sink in." CHC said it was flying for oil company Total and that the aircraft had lost communication as it approached the airport on the southern tip of Shetland's main island. A coastguard boat searches the North Sea A spokesman said: "The aircraft was on approach to Sumburgh Airport at approximately 6.20pm when contact was lost with air traffic control." Mark Abbey, regional director for CHC, expressed his "heartfelt sympathies to all those involved" but said the company would not be speculating about the cause of the crash. Investigators from the Department for Transport's Air Accidents Investigation Branch will look into the incident. The helicopter was upside down in the water when rescuers arrived, said Sky's James Matthews in Aberdeen. "At least three of the four who died had trouble getting out of the wreckage. One body remains in there this morning," said Matthews. The survivors were aided by waterproof immersion suits that helped keep them afloat and warm in the North Sea. The tide - which was heading towards the land - also helped survivors. Jim Nicholson, RNLI rescue co-ordinator, said: "There appears to have been a catastrophic loss of power which meant the helicopter suddenly dropped into the sea without any opportunity to make a controlled landing." He said the weather was not "particularly good" at the time of the incident. "There was a fresh wind, not overly strong, visibility is not particularly good and it was misty in the area - but I doubt if that would have had any impact on causing whatever happened to the helicopter," Mr Nicholson said.