hiya
Whoaaaa, slow down!!!!! I also own a Suunto D3 and consider it to be the best piece of diving gear i've bought. As a spearo, i'm always looking to improve my diving. Changes in tecniques can be measured accurately on your dive watch. I also use my D3 to keep my dives cosistent. 1:30 dive time and 1:30 rest. Not the very best of dive times

, but i'm still learning!!!
I'm a very scared diver. Not shy to say that my greatest fear is shallow water black-out (swb). Using a dive watch enables your to control your diving. Point in case: the areas i now dive is at a depth of 14-18m water. I'm most comfortable at that depth. I will hunt very occationally at 20-22, but thats about my limit. About a month back we were spearing yellowtail in very clean water. I went down and could see the fish on the bottom, big 10-15kg class fish. About 5m from the bottom i glanced at my d3. 27m it read. I was so focussed on those fish that i exceeded my depth. Had i not seen the depth on my d3, who knows................
Like i said before, i'm a very carefull diver, but as soon as you get focused on a big fish, your sense of depth and breath-hold dissappear. I've seen on my dive times, that if there are fish around i tend to stay longer under. Has happened on many occations, that just as you decide to surface a fish comes along
and its almost as if you get your second breath!!!
Regards
miles