Police divers resumed searching Tuesday for six people, including British tech magnate Mike Lynch, believed trapped some 50 meters (164 feet) underwater in the hull of a superyacht that sank in a storm off Sicily.

Divers in wetsuits and oxygen tanks returned to the site off Porticello, near Palermo, to tag-team in 12-minute underwater search shifts where the luxury sailboat went down. Fire rescue crews reported that divers only made it to the bridge during a first search, and were unable to access the below-deck cabins because they were blocked by furniture that had shifted during the violent storm that toppled the vessel early Monday.