If you're using the Rule of 120, do you ever use a mathematical equation to compensate for a less than totally square profile?
For example instead of having 40 minutes at an 80ft max depth dive do you compensate for say 1/3 the time at 60 and 3/4 the time at 80 or do you only dive the 120 rule like you would the P tables. Even if you aren't at 80ft the entire time.
Do you lenghten your time by say 10 minutes to compensate for the split difference allowing 50 minutes as long as you aren't at 80 the entire time?
For example instead of having 40 minutes at an 80ft max depth dive do you compensate for say 1/3 the time at 60 and 3/4 the time at 80 or do you only dive the 120 rule like you would the P tables. Even if you aren't at 80ft the entire time.
Do you lenghten your time by say 10 minutes to compensate for the split difference allowing 50 minutes as long as you aren't at 80 the entire time?