UPDATE 1-Crew members on Mike Lynch yacht tell of moments it sank off Sicily

Adds comments by crew members reported by Italian on Sunday

ROME, Sept 1 (Reuters) - 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 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 agency Ansa on Saturday.

Griffiths, the boat's captain James Cutfield, and ship engineer Tim Parker Eaton have been placed under investigation by the Italian authorities for potential manslaughter and shipwreck. Being investigated does imply guilt and does mean formal charges will follow.

"I woke up the captain when the wind was at 20 knots (23 mph/37 kph). He gave orders to wake everyone else," Ansa quoted Griffiths as saying.

"The ship tilted and we were thrown into the water. Then we managed to get back up and tried to rescue those we could," he added, describing the events of the early hours of Aug. 19, when the Bayesian had been anchored off the Sicilian port of Porticello.

"We were walking on the walls (of the boat). We saved who we could, Cutfield also saved the little girl and her mother," he said, referring to passenger Charlotte Golunski and her one-year-old daughter. In all there were 15 survivors of the wreck.

Cutfield exercised his right to remain silent when questioned by prosecutors on Tuesday, his lawyers said, saying he was "worn out" and that they more time to build a defence case.

Before this, Cutfield gave a similar description to Griffiths' to investigators, according to comments reported on Sunday by Italian daily Il Corriere della Sera.

Cutfield said the boat tilted by 45 degrees and stayed in that position for some time, then it suddenly fell completely to the right, the reported.

Parker Eaton had previously commented on the investigation. On Sunday, Il Corriere quoted him as saying that all doors and hatches were closed when the storm hit the boat, except one giving access to the engine room.

That door was located on the side opposite to the tilting and so could be a factor causing the sinking, he said.

Prosecutor Raffaele Cammarano said last week that the vessel was most likely hit by a "downburst", a very strong downward wind.

The sinking has puzzled marine experts, who said a vessel like the Bayesian, built by Italian high-end yacht manufacturer Perini, should have withstood the storm and, in any case, should have sunk as quickly as it did.

Prosecutors in the town of Termini Imerese, Palermo, have said their investigation will take time, with the wreck yet to be salvaged from the sea.

(Writing by Keith Weir, Giulio Piovaccari
Editing by Frances Kerry)

((giulio.piovaccari@thomsonreuters.com))