Blackcrusader
Contributor
Reread my post please. I said they were a learners permit. The very basics. I believe everyone should be trained to use Nitrox right from open water. It’s so basic it should be include from the very beginning.
When I did my BSAC Sports diving in 1986- 1988 there was no nitrox or courses for it. So all dives were NDL or deco air dives.
Nitrox and nitrox deco dives just become normal for me after that. Yes it is good divers even with OW to do a nitrox course and I have seen many do it in addition to their AOW. A lot of dive centers push nitrox courses. As for marine life identification ( not just fish ) I would take video or photos then spend time reading books on the marine life at the dive centers I dive with as they also keep a library of books for their own staff and customers to use as well. I've never taken a course for it as I do more often than a lot of other people. Those who may not dive a lot that course would help a lot. Same for my photography I never took a course but I am getting very good photos and video's from my diving vacations.