Scuba divers can't get there, submarines go right on past it.

Can you swim underwater?

I've made hundreds of dives in submersibles.

There're three basic limitations of scuba diving.

The only creatures that have got conscious control of their breath are the diving animals and the diving birds.

But scuba diving, submersibles and all the work that we're setting about to do here will help rectify that.

They come right up to the submarine they'll put their eyes right up to the window and peek inside the sub.

These birds make a living by diving into the water.

It was an evening dive.

There is many different aspects to free diving.

I don t know of any other submersible, or even remote, that just takes advantage that this is a three dimensional space.

manage and display dive computer data

This one we actually first discovered back in the air days the bad old air days, as we used to say when we were doing these kind of dives with air.

You can see sharks in every single dive.

Sue Austin Deep sea diving in a wheelchair

And this one is the deepest diving submarine in the world, operated by the Japanese government.

Just absolutely amazing, every single dive.

We need new deep diving submarines.

That's a little diver up there in the corner.

So you can imagine scuba diving here.

And I've dived in deep sea submersibles around the world.

They've never been dived.

And I talked to divers that had been diving there for many years, and they said that the marine life was better here today than it was in the 1960s.

We did 250 hours of diving here in 2005.

But, the point is that scuba divers generally stay less than 100 feet deep, and very rarely go much below this, at least, not with any kind of sanity.

But let's also think, as a visual species, what it's like when we go snorkeling or diving and try to look underwater.

Romulus Whitaker The real danger lurking in the water

This is us chasing it in the submersible.

Recently, diving off in the Gulf of Mexico, finding pools of water, this time not upside down, right side up.

I led three diving expeditions to Antarctica.

When I first went to the Maldives, dead keen on diving, spent as much of my time as I could in and under the water.

For those of you who've been there, fantastic coral reefs, fantastic diving, fantastic snorkeling.

The problem happens when you start to go underwater.

But, the problem was that it didn't allow us much time.

This, I think, represents one of the most beautiful classic submersibles built.

If you look at that sub, you ll see a sphere.

This came out of hundreds of dives I have made, farting around in the dark using these platforms, and my impression that I saw more animals working from the submersible than I did with either of the remote operated vehicles.

Diving day and night was really easy for me in 1970, when I led a team of aquanauts living underwater for weeks at a time at the same time that astronauts were putting their footprints on the moon.

You throw it over the side of your boat and you basically scuba dive without getting wet.

Well, in the context of diving, you get too much, you die also.

And of course there're multiple displays, to get the information to the diver.

So the sub that was outside last year this is the one.

Many Parties have already exploited hydropower potential.

Since the incident the United Kingdom had changed its diving procedures.

Now, submersibles are great, wonderful things, but if you're going to spend 30,000 dollars a day to use one of these things, and it's capable of going 2,000 feet, you're sure not going to go farting around up here in a couple of hundred feet, you're going to go way, way, way, down deep.