A Coast Guard air crew safely rescued four people from a sinking fishing vessel late Wednesday south of Martha’s Vineyard.

The captain of the vessel Sea Star radioed for help at about 6:20 p.m., reporting that their boat was taking on water and that they were donning immersion suits, the Coast Guard said in a press release.

Coast Guard sector Southeastern New England diverted air crews from a training flight to respond to the scene, about 18 miles south of the Island.

It was determined that the vessel could not be saved, the fishermen were ordered into the water and airlifted into the MH-60 Jayhawk helicopter, aided by a rescue swimmer, the release said.

The air crew flew the fishermen, who have not been named, back to Air Station Cape Cod where they were evaluated by EMS and found to be in sound health.

Water temperature at the time of the incident was 37 degrees, with 20 to 25-knot winds and five-foot seas. The Coast Guard credited the captain and crew for taking all the right steps.

“The most important things the crew did was activate their EPIRB and don their immersion suits,” said Scott Backholm, a command duty officer.

The Sea Star has sunk and a marine safety bulletin was issued to notify nearby mariners.