You need rescue for either Master Diver or Divemaster, and you should do that regardless.
Master Diver isn't useful for anything, divemaster is only useful if you want to teach. Neither will do anything to make you a better diver.
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It sounds like you didn't think too highly of your tech training, which is too bad. Well trained tech divers make better recreational divers than well trained recreational divers. Period. There is more thorough behaviors and more rigid protocols that, when committed to muscle memory, make your diving - regardless of the depth or profile - safer.
Suggesting that a recreational diver couldn't benefit from learning technical protocols is borderline irresponsible as an instructor.
I think a lot of my tec training, but I did it to be able to tec dive, not for improvement in recreational diving. I haven't suggested anywhere that someone wouldn't learn from a tec course, what I have said is taking the course purely for the sake of the course is not ideal.
If someone wants to learn to tec dive, yes the training will transcend across to their recreational diving, but again, not to do a course just for a courses sake. If that is irresponsible, then so be it.
---------- Post Merged at 05:04 AM ---------- Previous Post was at 05:02 AM ----------
If I wanted to be a better car driver I would not learn to drive a tank. But I would take a professional racing course even if I never intended to race on the track at all.
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Hmm, toe and heel techniques for automatic vehicles on the road??? Bit of an over-kill.
Personally, I took an advanced driving course and the advanced driving test in the UK.