Don Shirley

It's actually in the middle of nowhere.

You're six hours or maybe nine hours from Joburg, Johannesburg, and there are no facilities there for a diver.

So you have to take everything.

We had a whole team of divers.

Everybody there was doing an epic dive in their own rights.

All diving effectively solo with the team moving through the water column.

So everyone is doing an incredible dive.

We go down early morning because we're doing a 12 hour dive.

So we want to dive early so that we can finish the dive still in daylight.

So at six o'clock, we are ready to dive.

Dave's in the water with all his gear, with his helmet on, with the camera.

And this is well, well, well before GoPro.

This is a monster on his head.

So he's got this camera which he turns on on the surface.

I get in the water with him before he goes because I want to show him that I'm ready to go because he needs to know that I can follow.

So we shake hands and he goes down.

You're actually in the darkest of blackest of places that actually eats your light.

The light just disappears.

It just evaporates.

It's like the cave is eating it up.