Mt. Sinai Hospital in New York opened its geriatric emergency room in 2012 as part of a nationwide effort to find a better way to treat elderly patients. (Heidi de Marco/Kaiser Health News/TNS) Credit: Heidi de Marco | TNS

A Knox County deputy was diagnosed with mild hypothermia Thursday night after his boat set adrift in Vinalhaven, forcing him to swim to shore.

Deputy Daniel Landers was in his cruiser near the Vinalhaven town dock around 9 p.m., when he noticed that the bow line holding his 16-foot personal boat broke, and it was set adrift, Knox County Sheriff Tim Carroll said.

Landers went to his boat, which was just off of the dock, and was able to jump on. He tried to maneuver the boat away from the rocks, but his boat became partially submerged with water. Landers decided to jump off the boat after he hit a rocky outcropping, according to Village Soup.

He swam 50 feet to shore, where he was met by a rescue crew. The deputy has mild hypothermia and possibly sprained his ankle. His boat was recovered and secured to a dock, Village Soup said.