[poacher]

If your diving with a buddy or a few others better to have only one guy in close distance of yourself to worry about -within shooting distance , keep your guns pointed away from each other dont dive together into each end of a swim through cave etc. and then shoot towards each other make sure your mate is not behind the fish your shooting at etc.
when swimming up or down make sure your gun is pointed in the opposite direction of your mate.
Make sure your gun is not pointed at you r mate ever -if the water is so dirty you cant see him you would be better off unloading the rubbers from the spear dont rely on a trigger mech or safety -they fail sometimes.
If your not close enough to find your buddy in a minute or 2 then dive as if your alone -this is in regards to limiting your breathold to well under your limit its no good if he finds you 10 minutes after you black out you won't be likely to be reuscitated then.