2. Pilots Randy Holt (left) and Robert Carmichael (right) discussing the incident after the recovery
3. SOUNDBITE (English) Robert Carmichael, submersible pilot:
"This is the hairiest emergency I've ever had in a submersible. It's the greatest fear: fire inside the cockpit. Your greatest fear. Where are you going to go? And you don't want to start dousing water on electrics necessarily, it's not really going to put it out."
4. Close up of technician going through the electronics
5. Close up of electronics
6. SOUNDBITE (English) Robert Carmichael, submersible pilot:
"There was a couple of minutes where I knew I was still at 600 feet (183 metres) and the cabin was filling with smoke, I was seeing the sub not moving as fast as I wanted to."
7. Sub technician carrying electronics away
8. SOUNDBITE (English) Robert Carmichael, submersible pilot:
"The oxygen level went completely to zero so whatever the fire was doing it was burning, consuming our oxygen, or producing a false indication on the oxygen alarm."
9. Close up of fire extinguisher with submersible in the background
A British scientist and her American pilot had to make an emergency ascent from 250 metres (820 feet) beneath the surface of the Indian Ocean off the Seychelles on Tuesday after smoke filled the cockpit of their two-person submersible.
The pair, from the UK-led Nekton Mission investigating climate change in the region, are both safe and back on the mother ship where an electrical fire aboard the sub is being investigated as the possible cause.
Pilot Robert Carmichael told The Associated Press he quickly fitted a breathing mask to himself and British passenger, Molly Rivers, before making an emergency rise to the surface after the oxygen indicator fell to zero.
"This is the hairiest emergency I have ever had in a submersible. It's the greatest fear: fire inside the cockpit. Your greatest fear. Where are you going to go?" said Carmichael, 57, who is from Florida.
A member of the submersible support team said it took 23 minutes for the stricken craft to reach the surface.
Neither Carmichael nor his passenger was hurt in the incident.
The submersible is one of two which have been used by Associated Press and by British broadcaster Sky TV, whose team was filming a" Deep Ocean Live" program, when the incident happened.
It is the sister vessel of a submersible which was carrying Sky presenter Mark Austin, when the incident began.
The submersibles are part of the Nekton Mission, a British-led scientific expedition to explore the Indian Ocean and document changes taking place beneath the waves that could affect billions of people in the surrounding region over the coming decades.
The mission has been dogged with bad luck, since it left Victoria, the Seychelles capital, at the start of March.
The Associated Press is the only news agency working with British scientists from the research team. Sky News is the mission's programming partner. AP video coverage will include exploring the depths of up to 300 meters off the coast of the Seychelles, the search for submerged mountain ranges and previously undiscovered marine life, a behind-the-scenes look at life on board, interviews with researchers and aerial footage of the mission.
The seven-week expedition is expected to run until April 19.