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(CNN) -- Authorities continued their search early Monday for a 46-year-old man who fell overboard while boating with his family near Westport, Oregon.
The man's family members told officials he was not wearing a life jacket when he fell off his 65-foot sailing vessel, Bad Dog, about 4 p.m. Sunday, said Coast Guard Petty Officer Eric Chandler.
Arlie Hoefling was sailing the vessel from Kerry West Slough, Oregon, to Astoria, Oregon, along with his three children, ages 13 to 18, when a strong wind gust caused the boat to tilt to one side, the Clatsop County Sheriff's Office said in a statement.
"The chair Hoefling was sitting on tore from the deck of the vessel, sending him into the water," the statement said. Hoefling's children reacted quickly, dropping the sails and contacting help, but Hoefling disappeared from sight, the Sheriff's Office said.
The Coast Guard was using a helicopter and a boat to search for the missing man. Local officials are also assisting, Chandler said.
The vessel was returned to Kerry West Slough, with the Clatsop County Marine Patrol assisting, authorities said.
CNN's Rick Martin contributed to this report.