dive tables

Do training agencies (including SSI) still teach how to use dive tables or has teaching tables gone the way of the slide rule?

Tables 1 and 2 are combined here. Tables 1 and 3 are showing no stop times right? What values does table 2 show?

Hi! I'm a very new diver, I just completed my open water this past summer and I have only been out twice since. In my training, we weren't really taught how to monitor our own nitrogen levels (we learned about it in theory, but just relied on the DM's computer while in the water) so I'm a bit...