Specialist divers were still looking for a missing woman, a coast guard official told AFP, with a source close to the investigation having earlier indicated Lynch’s 18-year-old daughter Hannah had yet to be found.

Divers pulled four bodies from the wreck of the Bayesian on Wednesday, while another was brought to shore in Porticello, near Palermo, on Thursday morning.

READ ALSO: Latest body pulled from Sicily yacht wreck is UK tech tycoon Lynch

The latest discovery brought the death toll to six after the body of a man believed to be the yacht’s chef was found shortly after the ship went down in a storm on Monday morning.

The 56-metre British-flagged sailing boat had been anchored some 700 metres off Porticello when it was struck by a waterspout – akin to a mini-tornado.

It sank within minutes.

Fifteen people were rescued, including Lynch’s wife, but the businessman and his daughter were among six people reported missing. 

The passengers were guests of 59-year-old Lynch – a tech entrepreneur and investor sometimes referred to as the UK’s answer to Bill Gates – celebrating his recent acquittal in a massive US fraud case.

Lynch’s lawyer Christopher Morvillo and his wife Neda, Morgan Stanley International chair Jonathan Bloomer and his wife Judy were also among the missing.

Questions remained as to why the yacht sank.

The head of the company which built the boat said on Thursday that the tragedy could have been avoided.

“Everything that was done reveals a very long summation of errors,” said Giovanni Costantino, head of the Italian Sea Group, which includes the Perini Navi company that built the Bayesian.

He told Italy’s Corriere della Sera newspaper that bad weather was forecast and all the passengers should have been gathered at a pre-arranged assembly point, with all the doors and hatches closed.

Security camera footage showing the ship from the shore showed the lights on its mast going out, which Costantino said indicated a short circuit, meaning that the ship had already taken on water.

“A Perini ship resisted Hurricane Katrina, a category 5 [hurricane]. Does it seem to you that it can’t resist a tornado from here?” he told the newspaper. 

Costantino said it was “good practice when the ship is at anchor to have a guard on the bridge, and if there was one he could not have failed to see the storm coming”.

“Instead it took on water with the guests still in the cabin…They ended up in a trap,” he said.

The Bayesian was built by the Italian shipbuilding firm Perini Navi in 2008 and boasted a 75-metre mast, the tallest aluminium sailing mast in the world, according to the Charter World website.

It was reportedly owned by Lynch’s family.

Lynch was acquitted on all charges in a San Francisco court in June after he was accused of an $11 billion fraud linked to the sale of his software firm Autonomy to Hewlett-Packard.

A co-defendant, former Autonomy executive Stephen Chamberlain, died after being hit by a car on Saturday in England.

Italian authorities have opened a probe into the sinking, while the UK’s marine accident investigation branch sent four inspectors to Palermo.