I read posts every now and then when it's mentioned that someone carries recreational dive tables with them underwater. Why?
In some cases the reason mentioned is in case the computer fails. If this happens so does the time and depth function and having the table will not resolve that.
Maybe they carry a separate time and depth gauge but then you don't know what letter group you are in or were in before the dive if you've been using a computer.
If it is simply just to be able to look up the NDL for a single dive (for example 20 minutes at 100 feet) it's simple enough to either memorize the table or just use the 120 rule or other short cuts so I'm curious what exactly is the scenario where you feel it's useful to have the table with you underwater.
Maybe I'm misreading the posts...entirely possible!
In some cases the reason mentioned is in case the computer fails. If this happens so does the time and depth function and having the table will not resolve that.
Maybe they carry a separate time and depth gauge but then you don't know what letter group you are in or were in before the dive if you've been using a computer.
If it is simply just to be able to look up the NDL for a single dive (for example 20 minutes at 100 feet) it's simple enough to either memorize the table or just use the 120 rule or other short cuts so I'm curious what exactly is the scenario where you feel it's useful to have the table with you underwater.
Maybe I'm misreading the posts...entirely possible!