[sciencemike]

I have done loads of diving at night mostly scuba hunting but some freediving hunting as well.

-No Current

-2 lights on you Backup and primary, and definately one glowstick attached to your mask strap, and possibly another to your gun/ polespear

-2 lights on shore crossing beams to show egress point through reef/rock

-I prefer RED light for hunting, bugs and fish really cant see it well enableing the snatch or poking.

-Dive in a place you know very well, and your buddy should have experience night diving.

-That feeling that somthing is right behind you breathing down your neck is perfectly normal - and quite possibly true

-If you have very clear water use a head lamp, at least for loading your gun, otherwise hold your torch of to the side at arms length to avoid back scatter.