Burntchef wrote:wish i knew how to do a screen shot so i could post a schedule. i run one depth that has 10 feet added to it, then 4 different bottom time spreads spaced 2 minutes apart. and each b/t has a additional minute added to it as well.
great discussion though thanks for adding some good questions chris.
This is my question: Why? I see what you do, but I would like to know the reason behind it. I am most defiantly not saying it is incorrect; I would just like to know the different thought processes.
The problems I had with this system are (and yes I did use it for a short time).
1. What if you did over stay your time by more than 10 min? Example you stay 6 because you saw something cool and then the "fit hits the shan" and it takes you SEVERAL minutes to sort out the issue. How would you deal with this since your schedule has only a 10 minute range? Assume reasonably shallow depth (150 ft or so) so gas is not an issue.
2. What if you over shot your depth by 15 feet (assuming your mix was flexible enough). Would you just bail on the dive?
3. Do you use run times or stop times? I used run times with this system and I found out if I was a little slow on the ascent I had to move over profiles. If you are 1 min late going from 60 ft to 50 ft do you really need move over to the next profile? This could amount to SEVERAL minutes of addition decompression.
4. What if you planned for 25-35 minutes of bottom time on your schedule, but you only stay 15 min. Do you do the deco for the 25 min schedule? If so how do you do the subtraction for your run times?
These are just a few issues I had with this system. Just curious how do you deal with them?
I was told to use this method because it is more conservative than straight VPM/RGBM, but I have found that if I need more conservatism, I just adjust my profile to match the higher level of conservatism that the program gives me, instead of just adding phantom minutes and depth.
In the end we should all do what make us feel warm and fuzzy inside.
Just curious about the different thought processes
I will check in later tonight ( I am off to DIVE)
Scott