Unbelievable moment diver spots hand of man who survived 60 hours underwater after boat sank to bottom of ocean

Footage shows of the incredible moment a diver came across a man who had been stranded at the bottom of the ocean for two and a half days after his ship sunk.

Harrison Okene was the sole survivor of a ship called Jascon-4, a vessel purposed to stabilize an oil tanker, carrying 12 workers that came into trouble in the early hours of one morning back in 2013.

The then 29-year-old was onboard working as a chef when he woke up before his shift to use the toilet - in nothing but his boxers - at which point, a huge wave crashed into the tugboat, flipping it upside down.

Harrison Okene spent 60 hours in the tiny air chamber (DNC Diving)

While in the bathroom, Okene noticed water was starting to creep in, which is not something you'd like to see while on a ship.

After hurrying out, he then came across a number of his colleagues as they battled to tie down the boat's hatch while the water inside continued to rise, The Guardian reports - at this point, he decided to make his way to the exit.

Sure enough, the unforgiving ocean forced its way in, and the current pushed him away from the exit further into the vessel into another toilet in the second engineer’s cabin.

Fortunately for Okene, the bathroom was the only room in the boat to have an air pocket inside, which was actually the floor. However, he was forced to cling to the base of the washbasin to keep his head there below the ceiling.

Because of this, he managed to survive for 60 hours on the seabed of the Gulf of Guinea, which is part of the Atlantic Ocean, located around 20 miles off the coast Nigeria.

He still attempted to make a break for the exit, but ended up breaking the door handle. He told The Guardian: "But I told myself, instead of panicking, you have to think of a way out.

"The air couldn’t go out of the boat completely. Some had to be trapped inside."

Okene later managed to find two mattresses - stacking them on top of each other - so that he was able to stay above the rising water in his tiny little bathroom chamber.

"I tried to kill the fear in front of me," he said. "Because one thing that can kill you fast is fear. That panic that comes at you, it kills you before your real death comes.

"Because the moment you start panicking, you use too much oxygen."

Okene defied all odds and miraculously survived (DCN Diving)

After around 60 hours, with no food or water, and with minimal air remaining in his chamber, it started to look hopeless but to Okene's delight, a diving crew appeared - with the mission initially just being to recover the bodies of those onboard.

To their surprise - and likely initial terror - a hand was waving at them after Okene spotted their head lights and swam out to flag for their attention.

After being rescued, he was then taken from the divers’ bell to a recompression chamber where he would be forced to spend a further three days, given that he'd have died if he returned straight to the surface.

"Everything was normal. My temperature, blood pressure. I thought, that’s not normal," he later explained.

You'd think after that, he'd never go near the ocean again, however, he ended up working as a diver.

He added that the incident had 'changed his life in so many ways'.