SassyScubaGal:AND, you also don't have to teach the tables anymore either (at least at my LDS)... Our instructors have abandoned them in favor of the eRDP....I've yet to use them, but isn't the eRPD just a dive table in electronic form? If the information is the same does it matter if you can trace lines up and down a table or punch a few keys so long as you are able to plan your dive? You're not really making much of a calculation (adding ABT +RNT)when you use the RDP anyway..