LOL. You keep saying this, and Stuart keeps pointing out it is incorrect.
Im failing to understand then how can NDL change if the GF hi does not change and the divers depth does not change. it starts with the computed value of say 20 minutes and counts down till it gets to 0 ndl left how it does it may not be so simple and complications of repeditive dives may alter things a bit if it changes compartments it is tracking but if in the most fundimental function of teh NDL if nothing changes,,,,, the NDL counter should be basically a timer counting down to zero. especially int he rec diving world.