Seems to me there's a difference.
Well, I think most would recommend that an advanced (tech) wreck course is a good idea prior to real wreck penetration(tech). But, even if the advanced (tech) course is skipped, (which I personally advise against), I still think that the specialty course is still a good prep for real (advanced) (tech) penetration, as long as one acknowledges that it is not the ONLY prep for advanced (tech) penetration.
Kind of like basic math is a prep for algebra, which is a prep for calculus which is a prep for diff equations.
I didn't mean to imply that one could go directly from the wreck specialty course (basic math) directly to technical (real) wreck penetration (diff equations).
If Jim meant something other than advanced or technical when he typed "real" wreck penetrations, I misunderstood. Maybe others have to and a clarification is in order?