A 15-year-old Alaska boy survived more than two days stranded on the overturned hull of a fishing boat after his older brother and cousin died in the frigid Bering Sea.

Dramatic rescue video shows the teen alone on top of the capsized 18-foot skiff as the fishing vessel Northwest Explorer approached.

Crew members pulled him to safety, and captain Adam White said the boy was still able to explain what had happened despite suffering from hypothermia and having “chattering teeth.”

The teen told rescuers that his brother was still trapped beneath the boat and that his cousin had fallen from the overturned hull the night before.

The teenager was spotted by a U.S. Coast Guard aircrew around 10:30 a.m. Monday, about four miles east of St. Lawrence Island.

The Coast Guard dropped a life raft and survival gear to him before directing the nearby Northwest Explorer to the scene.

Before the aircraft had to leave to refuel, crew members dropped a line of flares across the water to help guide the fishing vessel toward the overturned boat.

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The teen had left Savoonga on Friday with his 35-year-old brother, Sidney Kulowiyi, and their 34-year-old cousin, Barton Rookok, for a halibut fishing trip.

They were supposed to return around 3 a.m. Sunday, but the boat never came back.

According to family spokesman Darren Toolie-Noongwook, a fishing line became tangled in the motor and caused the skiff to flip.

Kulowiyi reportedly became caught in the line and was pulled underneath the boat.

The teenager and Rookok managed to climb onto the overturned hull, where they spent the first night together.

During the following night, Rookok became distressed, went into the water and drowned, according to the family.

That left the 15-year-old alone on the overturned boat.

Family members said he had no food or drinking water as waves repeatedly crashed into the hull. They said he spent part of the nights kneeling and praying.

Exactly how long he was stranded remains unclear.

Toolie-Noongwook said the boat flipped at about 8:03 p.m. Friday. If that timeline is correct, the teen survived for more than 62 hours before the Coast Guard found him Monday morning.

However, an aunt separately told the Associated Press that she had been told the boat capsized Saturday night.

The Coast Guard has not released an official time for when the skiff overturned and has not publicly determined what caused the accident.

Rescuers also gave different estimates for the water temperature, ranging from about 40 to 50 degrees.

Despite the brutal conditions and the loss of both relatives, the teenager survived until rescuers reached him and brought him aboard the Northwest Explorer.