Gary Leo Rehm Jr. Facebook

One of the seven sailors who died aboard the USS Fitzgerald saved more than a dozen of his fellow shipmates before he ultimately lost his own life, The Daily Beast reported Tuesday.

The USS Fitzgerald collided with a Philippine-flagged merchant vessel about 56 miles off the coast of Japan on Saturday.

Seven sailors were later found dead in flooded compartments on the ship.

When the Fitzgerald collided with the merchant ship, 37-year-old Fire Controlman 1st Class Gary Leo Rehm Jr. "leapt into action," according to The Daily Beast.

The Fitzgerald was struck below the waterline, and Rehm's family was told by the Navy that he went under and saved at least 20 sailors, according to WBNS-10TV in Columbus, Ohio.

But when he went back down to get the other six sailors, the ship began to take on too much water, and the hatch was closed, WBNS-10TV said.

"That was Gary to a T," Rehm's friend Christopher Garguilo said, according to NBC4i in Columbus. "He never thought about himself."

"The sailors on the ship he called his kids," his uncle, Stanley Rehm Jr., told The Daily Beast, adding: "He said, 'If my kids die, I'm going to die.'"

The damaged USS Fitzgerald on Saturday being towed by a tugboat near the US naval base in Yokosuka, Japan, southwest of Tokyo, after the destroyer collided with a container ship in the waters off the Izu Peninsula. Associated Press/Eugene Hoshiko

Rehm was known to invite "his kids" over to his house in Virginia when their ship was docked in the US, his uncle said, according to The Daily Beast. "He was always ready to help anybody who needed it. He was just that kind of guy."

"Gary was one of those guys that always had a smile on his face," Daniel Kahle, who had served with Rehm on the USS Ponce, told the Ohio-based Chronicle-Telegram. "(Gary was) such a great guy and (it's) such a great loss. He needs to be remembered for the person we all knew him to be."

Rehm's uncle told The Daily Beast that Rehm followed in the footsteps of his grandfather by joining the Navy straight out of high school.

Rehm was considering retiring soon but also hoped to make captain one day, his uncle told The Daily Beast.

The USS Fitzgerald at the US naval base in Yokosuka on Sunday. Thomson Reuters

The Fitzgerald is named after another sailor, Navy Lt. William Fitzgerald, who, like his father, also joined the Navy right out of high school.

In August 1967, he was advising South Vietnamese forces at a compound near the Tra Khuc River delta when they came under heavy Vietcong fire.

Fitzgerald ordered the South Vietnamese forces and civilians to escape into the river on small boats, but he was killed while covering their escape with small-arms fire.

Rehm was raised in Elyria, Ohio, and is survived by his wife, Erin.

Read the full piece at The Daily Beast.