Quote Originally Posted by Nitrogenius View Post
GF hi sets your relative conservatism, but be weary that one influences the other so GF X/70 vs GF Y/70 never does represent the same level of conservatism of your overall deco.. The only thing it says is that your LEADING Compartment will have an MValue of equal or lesser than 70% of its allowed highest value according to Buhlmann original values..
Bit of a correction:
The GF high sets the conservatism on surfacing.
As opposed to low which sets the conservatism on the start of offgassing.

Quote Originally Posted by Jax View Post
Negative.
There simply are people that move their gradient factor choice the same percentage from the absolute.
The only way to keep the same percentage from the absolute (the absolute being straight Buhlmann) is to have GFs of 10/10 or 20/20 or 80/80.
Again, the GF low is a percentage of straight Buhlmann when your very first tissues start to offgass (others may still be ongassing).
The GF high is your percentage of straight Buhlmann on hitting the surface.

So if you were diving straight Buhlmann (100/100) you aren't diving 200 of anything. It's just that your M-Value is 100% the entire way up. When you adjust those numbers, or just leave them at 30/70 at some point you will be at 47% then at 63% of Bulmann's model of offgassing, then, as you ascend you'll get closer and closer to 70%. When you reach it at your last stop... your computer will tell you you are clear to exit the water.

So there is no rational value or point it trying to balance the two number to equal 100. Because it isn't 100 OF anything. They're two independently working points to create a "slope" of ascent.