Are Deep Dive and/or Wreck Dive specialties necessary?

[Jafo19D]

Let's see if I can clarify it for you since you aren't grasping what should be a simple concept

Having a bad day? Wife leave you or something?

 

[AnnikaPersson]

so if someone arrives to do a straight forward 30m wreck dive and they showed you a bunch of cards eg Adv tirimix OC Mod 3 ccr, full cave and adv wreck you'd want to do a check out dive first?

Well, it depends..
It the dive is for ex in a total different environment, with 2 C degrees for ex, and the diver has not been in this environment before or recently, I would suggest it is good to do a bit of test dive first.

 

[Jim Lapenta]

Well, it depends..
It the dive is for ex in a total different environment, with 2 C degrees for ex, and the diver has not been in this environment before or recently, I would suggest it is good to do a bit of test dive first.

This is something I agree with. I've had too many experiences with people not used to cold water finding out that it can be an entirely different animal. My first ocean rescue was assisting the DM on a boat off Catalina. Guy was AOW with 30 some dives. All in the Caribbean. His first time in a 7mil with a lot more lead than he was used to and the water temp was 56 degrees F/13 C. He stated that when the water went down his spine, it freaked him out, and he realized he also couldn't move like he was used to. Add to that surfacing in kelp and not being able to swim, well.......
We had to go out and tow him back to the boat.
I've been under the ice, in 34 degree F/1.1 C water, and had to clear my mask when the strap came up my hood and it kept flooding. Taking it off and putting it back on was like getting slapped in the face. But you learn from that and it's a lesson that stays with you.