A Nigerian man survives 62 hours underwater, in a shipwreck's air bubble.

29-year-old Harrison Okene was sure he was going to die... until a rescuers' flashlight pierced through the darkness.

(DIVER MOVING THROUGH DARKNESS UNDERWATER / AUDIO OF CONVERSATION IN ENGLISH BETWEEN HE AND THE DIVE LEADER CAN BE HEARD)

"He's alive! He's alive!"

(HAND GRABS HOLD OF DIVER'S HAND)

"All right just keep him there. Keep him there."

A tugboat had capsized off the coast of Nigeria in May, while stabilizing an oil tanker filling up at a Chevron platform.

Of the 12 people on board, divers recovered 10 dead bodies.

The ship's cook had not been found - until this moment, captured in recently emerged video.

(OKENE SITTING IN WATER INSIDE HULL, DIVE LEADER SAYS:

"Tell him to keep drinking his water. Where's his water? Drink it buddy, drink it. He hasn't drunken much eh?"

"Nah he's almost finished it"

"Oh he's almost finished it, ok sorry. Tell him to... what's wrong with him?

"He says it's cold."

"What's cold, the water? Yeah. He says the water's cold."

After the ordeal, Okene spent another 60 hours in a decompression chamber where his body pressure was returned to normal.