We dived the wreck of the Brunswick in mid July, when the water was cold and the visibility was rather nice. While filming a bit of the wreckage (very overgrown), I came across Tony instructing Craig and Christo to swim fixed distances (one swam 10 metres, the other swam 12) so that they could estimate the visibility. It’s a simple exercise but one that helps to improve your ability to estimate distance underwater, which isn’t easy.
[youtube=”http://www.youtube.com/watch?v=1gSkdgT_VQc&w=540″]
