A diver who died after off the coast of Suffolk on Friday has been named as Christopher Vanstone.
Mr Vanstone, who was 49 and from Brixton in London, had been diving about 17 miles offshore when he encountered problems.
A second diver helped to bring him to the surface but lifeboat crews from Great Yarmouth said he was unconscious and was not breathing.
Mr Vanstone was airlifted to the James Paget Hospital at Gorleston, Norfolk, but he was pronounced dead on arrival.
Suffolk Police said a post mortem examination carried out at the weekend had confirmed he died from drowning.
Officers said there were no suspicious circumstances following the death and that Mr Vanstone's fellow divers, and those on board the boat, had made "extensive efforts to save his life".