A father and son are safe after their boat capsized in Boston Harbor earlier this week.

On Wednesday around 6:35 p.m., officers assigned to the Boston Police Harbor Unit responded to a call that a boat off the coast of Graves Light was in water and sinking, the Boston Police Department said in a statement which was posted on Facebook.

At the time, officers were on patrol at the harbor and only “about eight minutes away,” according to the police department.

When authorities approached the vessel, named the “Glory Days,” they could only see the edge of the vessel above the water. And it wasn’t until they got closer that they “noticed two men floating, holding a blue cooler.”

The father, who is 76, was wearing a life jacket, while the son, who is in his 30s, was not, according to The Boston Globe. Their dramatic rescue was caught on a police officer’s body camera.

By the time they arrived, father and son had already been treading water for about 10-20 minutes, the paper said.

“The men reported to officers that they were weak and had difficulty keeping their heads above water,” police said in a statement.

“They were cold, they looked very tired and weak and they were trying to keep their heads above water,” said Stephen Merrick, one of the officers who rescued the couple, according to NBC Boston.

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Police said in a statement that after rescuers were able to pull them to safety, the men – who were out lobstering – reported their boat’s engine became entangled in lobster lines and they subsequently died.

“They may have gotten tangled in some lobster traps, which killed their engines, and either the current or the wind may have pushed them onto the rocks,” said Officer Garrett Boyle, the other officer who assisted in the rescue, according to NBC Boston. .

Both men were treated by officers and attended by Boston EMS once they reached shore, police said. Their boat was raised and towed to Thompson Island.

Although the story had a happy ending, police say father and son are lucky to be alive.

“You may have eyes for them, [think that] they’re safe, but they’re not,” Boyle said at a press conference, according to CBS Boston. “It’s very fast. You could even look at them and … they just fall right down and we could never get them back up. Scary.”