I reckon the diving equivalent of pocket protectors has to be slates with PADI tables. No one on the planet uses them except PADI geeks.<turn on the loaded question>
Andy ... be honest now ... do you have the slate version of the PADI tables ?<turning off the loaded question />
I do have the submersible version of the PADI RDP.... I used to have the Wheel as well, but I lent it to someone (can't remember who - probably an instructor candidate too tight to buy their own) and never got it back.
To be fair, though, the only tables I carry on any dive are laminated "bend and mend" air Buhlmann tables that I printed myself, that are my "F**K, GET ME OUTTA HERE" option for any dive that goes a bit Pete Tong.