QKRTHNU
Guest
Those of you that do multi-level dives without the use of a computer, could you please share how you calculate your NDLs?
I've seen a few different methods while searching the board.
#1. The Wheel (Sounds like using an abacus)
#2. After diving below 3ata spend at least as much time above 2ata (Uncle Pug's method)
#3. I've seen a lot of references to average depth. I'm not sure if people are calculating average depth and then using tables/120 rule and basing NDLs on that or what.
#4. Use tables and figure a no-surface-interval repetitive dive to calculate the multi-level profile.
#5. Read the tables sideways (When I compared this method with the others it only matched up if I used the next deeper depth column for successive levels, which made it very close to option #4.)
BTW, I do plan on purchasing and using a dive computer. I just would like to be able to do without it if need be. And double check it for my own peace of mind.
I've seen a few different methods while searching the board.
#1. The Wheel (Sounds like using an abacus)
#2. After diving below 3ata spend at least as much time above 2ata (Uncle Pug's method)
#3. I've seen a lot of references to average depth. I'm not sure if people are calculating average depth and then using tables/120 rule and basing NDLs on that or what.
#4. Use tables and figure a no-surface-interval repetitive dive to calculate the multi-level profile.
#5. Read the tables sideways (When I compared this method with the others it only matched up if I used the next deeper depth column for successive levels, which made it very close to option #4.)
BTW, I do plan on purchasing and using a dive computer. I just would like to be able to do without it if need be. And double check it for my own peace of mind.