The Hastings All Weather Lifeboat was requested to launch at 11.39am after reports of a missing diver 11 miles off the coast of Hastings.
The ‘mayday’ distress call was received shortly after 10am from a local dive charter boat when one of their divers failed to fully surface after a deep sea dive.
The RNLI’s Shannon Lifeboat 13-28 was in the area carrying out the final crew consolidation assessments, and so was immediately diverted to assist along with the Mersey 12-002, RNLI Eastbourne and two Search and Rescue Helicopters.
HM Coastguard said it issued a Mayday relay broadcast to all vessels in the Dover Straits to keep a watchful eye out for the missing diver.
Sadly, despite the multi-vessel search, the diver was not located and the lifeboats were all stood down at 5pm.