Salvage crews in Italy are attempting to raise the wreckage of the superyacht Bayesian, which was owned by tech executive Mike Lynch and his family. They hope to find clues that will help explain why the $40 million ship sank last August in hurricane-force winds that blew in to the Sicilian port where the ship was moored for the night. The passengers were gathered for a cruise to celebrate Lynch’s recent acquittal in a longrunning fraud case in the U.S.

Seven of the 22 people on board were killed, including Lynch and his daughter; one of his defense lawyers; and a senior Morgan Stanley banker. A preliminary report in May from the U.K.’s Marine Accident Investigation Branch found that the Bayesian’s more than 200-foot mast—the tallest in the world when it was built—left the ship “vulnerable” to high winds.