CHICAGO (CBS) — A search-and-rescue operation is continuing after a boater went overboard about a mile offshore in Lake Michigan near Montrose Harbor Saturday evening.

The 54-year-old man fell from a sailboat about 6:45 p.m. in the water between Montrose and Diversey, police said.

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People aboard the sailing vessel “Three’s Company” said Brown fell off the bow of the boat when the railing broke.

The five other people on the boat said they saw him resurface once then lost sight of him as they tried to toss him a life ring, the statement said. They said Brown, who was last seen wearing khaki shorts and a grey T-shirt, was not wearing a life jacket.

Coast Guard Petty Officer Levi Read told WBBM Newsradio’s Steve Miller that their computer models indicate that because of the currents last night, the man might have been pushed to shore.

“We’re looking for public assistance in locating Daniel Brown, a 54-year-old male, last known to be wearing khaki shorts and a gray T-shirt, reportedly fell overboard (from) a sailing vessel… last night.

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“Looking for any information on any family members, or his possible whereabouts.”

Petty Officer Read says they’re hoping the currents worked in his favor.

At the time Brown fell overboard, the passengers of “Three’s Company” said they were in the lake between North Avenue Beach and the entrance to Diversey Harbor, the statement said.

According to the Coast Guard, “Three’s Company” was “disabled” and was towed by a Chicago marine unit to Belmont Harbor.

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Crews from the Police Marine Unit, Chicago Fire Department and U.S. Coast Guard searched overnight, and the search remained ongoing on Sunday.