Crew members on Mike Lynch’s yacht have spoken of the moments when a storm sank the vessel off Sicily and their efforts to help save passengers, after a disaster that killed the British tech tycoon and six other people.

Matthew Griffiths, who was on watch duty on the night of the disaster two weeks ago, told investigators that the crew members did everything they could to save those on board the Bayesian, according to comments reported by Italian news agency Ansa on Saturday.

Griffiths, the…