Four boaters, all from Hampton Bays, were rescued from treacherous waters after authorities said their boat overturned late Sunday afternoon in Long Island Sound off Cutchogue.

Police and fire officials learned of the incident after one of the boaters was able to call 911 moments before the sinking 19-foot center console Key Largo capsized. The rescue occurred as police and firefighters prepared to launch a rescue boat — only to have passing good Samaritans come upon the scene and pull the four, who had been clinging to the overturned hull for about a half-hour in 65-degree water, aboard their 20-foot boat for transport to the beach.

The rescue occurred, Cutchogue Fire Chief Michael C. Boken said Monday, at 5:49 p.m. about a half-mile offshore northeast of Duck Pond Point.

The 30-year-old captain of the capsized boat could not be reached for comment Monday.

Neither could the good Samaritans listed by Southold Town police as the passenger and captain of the rescue boat.

All four of those rescued were wearing life vests, fire officials said.

The four rescued men were examined at the scene by first responders, and all declined further medical treatment, police said.

"When we got there and looked out in the water, you could see four people clinging to the bow of the boat," Boken said, noting firefighters from Cutchogue and Mattituck, as well as Southold police, were all notified of the incident thanks to the emergency cellphone call.

Further good fortune for the distressed boaters happened as Southold Police Officer James Crosser tracked the capsized boat with a department-issued drone.

"Some good Samaritan came out of the east in a jet-propelled boat, managed to get the four out of the water, then brought them to the shoreline," Boken said. " . . . A couple of them were queasy, but we got blankets on them, got them some water, and once they got their feet under them and started warming up, it was all fine."

Police said a Sea Tow boat eventually brought the capsized boat into Mattituck Inlet.

"It was a little bit choppy and there was a bit of wind and swell, so this definitely could've had a different ending," Boken said.