Well, that´s `just one part of the night dive thing, isn´t it `Peter. It is actually so much more sensible on the dive plan agenda, to do a night dive on a site that one has done in the day. The experience will be totally unreal, but one might actually have a bit more confidence once the diver realizes, oh yeah, �´ve seen that formation in the afternoon.
As for Elbert suggesting different sites for diffent seasons, I´m one hundred percent on board . . erm, under . .