The U.S. Coast Guard responded to a distress call reporting a boat on fire in Vineyard Sound Tuesday afternoon, but the problem turned out to be an oil leak that was generating a lot of dark smoke.

According to the Coast Guard, the operator of the vessel, a 30-foot cruising power boat, called for help and said his vessel was on fire. The vessel, named Mac Daddy and homeported in Marion, was about a mile west of the entrance to Lake Tashmoo, on the Island’s north shore.

Tow Boat/US, a private marine towing company, responded to the distressed vessel about 1:45 p.m.

“An oil hose ruptured,” Captain Dan Carpenter of Tow Boat/US said. “He lost power and had large volumes of smoke from the oil on the engine.”

Once the Coast Guard personnel determined there was no fire and everyone on board was safe, they ended their involvement in the incident.

The towing company towed the vessel back to Falmouth Harbor.