Ditto on the average basic wreck cert. It really does not prep you for any real penetration. Inside the light zone 1st and if it's PADI no more than 130 linear feet with a reel. NO progressive penetration at all. That means if you are at 100 feet you don't go more than 30 feet into the wreck. and again as long as it's in the NATURAL light zone. Even if you are carrying a light and you should have two.
I respectfully disagree with the above. Having assisted in many wreck dive specialty training sessions, I think that is exactly what this course does. It Prepares you for more advanced wreck courses. Over 50% of the students foul the wreck reel/line. Most don't have any idea how to follow a line. Some will let it go way slack, others will use it to "pull" themselves through tighter areas since they don't know proper fin technique. But, after a few tries and some counseling, most end up know what they need to work on, and knowing what they don't know. To me, that is prep for real penetration courses.
I am surprised how many rec divers are excited about being around a wreck. Last month, in Grand Caymans, I was with a group that did the Landing Craft Nicholson. This is an open craft similar to what you might have seen in movies about D-Day. The divers were like a puppy dog with a new toy. They had a blast, even though there was absolutely no penetration, no lines, not what most consider to be a wreck dive, but a dive of a wreck.
So, why dampen the expectations of an excited student diver telling him basically the class is worthless?
I think some of you can't remember what it was like to dive your first wreck, and learn to use the reel (not just when, but also how). I think it is kind of like your first car. Most of us didn't get a brand new Ferrari or Lamborghini, but we still had fun driving.