NEW BEDFORD — New Bedford Police port security unit arrested Christopher Karo, 61, of 2 Old Powder House Road, Lakeville, Tuesday for operating a boat under the influence of liquor after he was observed to be intoxicated at Pease Park Ramp in New Bedford Harbor, authorities said. 

A witness observed Karo showing signs of impairment as he attempted to dock his inflatable boat at the ramp. He was observed traveling toward the ramp at about 7:15 p.m. and arrested just after 9 p.m., police said.

New Bedford Police participated over the weekend in Operation Dry Water, a campaign to raise awareness of the dangers of driving a boat while intoxicated.

Alcohol was the main factor in 15 percent of boating deaths where the leading cause was known, police said in a news release.