Aquanaut - Episode 4: The tragic loss of a dear friend, and my own close shave, disorientated, lost and alone inside a shipwreck.

This episode reminds us of the dangers of SCUBA diving with two stories. The first is a description of the tragic death of an experienced diver and a very dear friend.
In the second, we dive inside the shipwreck of a scuttled warship and experience a new definition of claustrophobia, lost and disorientated inside. When the wreck is upside-down, will that ladder take you up to safety or even deeper into the darkness?