mixed gas diving

The Deep Scattering Layer

First noticed during the latter stages of the Second World War when hydro-graphic survey ships equipped with echo sounders showed a ‘phantom seabed’ appearing on the graphs, the Deep Scattering Layer (DSL) often appeared many hundreds of fathoms above that… Read More ›

A Chain Reaction

Putting the bite on sharks may not be good for our health.  There are distinct advantages in being at the top of the food chain.  Not least the fact that with so many choices between the lower end of the… Read More ›

Howard Hall and the ‘Deep Sea’

(In 2006, I had the opportunity to chat with legendary underwater film-makers, Howard and Michelle Hall. The following interview was first published in April of that year. ) ———— For filmmaker, Howard Hall, diving and photographing the undersea world has… Read More ›