FWIW, I have an intro card from the NACD that was issued in 1994 and has no expiration date. And I'm also a TDI instructor that will be taking a TDI intro-cave IE in the very near future (and am working slowly towards my CDS basic cave instructor rating too).
However, there have been several fatalities where intro divers got bored and pushed their limits. 2010, Patricia Barkley comes immediately to mind. She was a 67 year old retired mother that had been diving Peacock Springs every week for four years and then tried to do a circuit.
Cave Diver's Forum - Cave Diving Resource
How would you respond if I suggested that any open water certification should expire unless they started cavern diving in one year?
Would a reasonable response to that suggestion be "Some people just want to dive open water and should not be in caverns, and are ok with that"
How would you respond if I suggested that any cavern diver certification should expire unless they took intro in one year?
Would a reasonable response be "Some people just want to dive caverns and not do intro, and are ok with that"
I'm betting in his many years of diving, Jim Wyatt has probably taught quite a few cavern classes. By the logic presented here EVERY single cavern student that has ever taken cavern has gone on to full cave and does multiple jumps and traverses... I'm betting that is not the case.
I bet some are happy just diving caverns.
Jim says there is a "financial incentive" in having a class that offers a card that does not expire... I really don't understand that statement.
I see the opposite. I see a "financial incentive" in forcing a student to take a full cave class to keep their intro card from expiring.
Is it really impossible for you guys to believe that there is at least one student out there who only wants to do intro level dives and has no want to do full cave dives thousands of feet back and doing decompression.
I really do think that intro level dives would be enough for me for my entire diving life. Is it possible that opinion could change after a few years? sure. But what if it didn't. What if I love doing intro level dives, am good at it, and have no interest in doing a dive past those limits, but "oh, wait, I HAVE to take full cave because my cards expiring" then your agency has just encouraged someone to dive beyond their comfort zone.
I really think you (not you specifically, I mean cave instructors in general) have a vested interest in selling one more class and an expiring card is one way to do that.
If you want to talk about people diving beyond the limits of their card that's one issue. They are not going to suddenly say "omg I will or won't, can or can't dive beyond the limits of my card" because of an expiration date on the back of it.