Quote: (Originally Posted by
divingtoors)
Hi
Very interresting topic. Good info from all the parties
I am an IANTD sport instructor, and what is written on the V-planner website was quite interresting and has some relation to Dr Mike's comments regarding accuracy..
HSS Software website:
"2003
February: V-Planner with VPM-B released at the NAUI Deep Stop conference.
IANTD includes VPM-B tables into all new training courses.
........"
Here is an extract from the IANTD.com website, regarding the use of deco tables:
"...
Currently, all IANTD courses use the Bühlmann ZH-L16 model for determining decompression obligation. These Bühlmann-based tables are among the most widely used dive tables in the world and the ZH-L16 system is used to calculate both staged and continuous decompression and is programmed into many of today’s dive computers..." VPMB/x seems not to be the decompression table of choice as advertised or reported on the V-planner website. Regards
Johan
Couple comments here...
1) I would suggest that part of the issue here is that IANTD is very poor at keeping their web site and other marketing materials up to date with a consistant message reguardless of what it is. I simple review of the rest of their material support that...
2) With out a doubt as you start looking at ANY deco algo, it's accuracy starts to go to s$#)(& at more extreme depths. (over 100m) This is partially because we are still arguing on how to treat "He" and Buhlmann is a perfect example of that.
3) The whole VR3 BUH and VR3 VPM thing has sent many of us into a tailspin with the exact situation that has been mentioned here. When diving the two computers together you get spanked by the VR3 BUH for doing what we all (or most anyway) think is a good thing... deeper stops slower accent to prevent the development of bubbles.... So now your f#*&)(& and you have Kevin Gurr has your money for both computers.. and he won't publicly state what he has done with the VPM algo that makes it "VPM"...
4) So what can we take from all of this.... Do the smart stuff.... Hydrate like crazy before you dive and do all of that stuff that should help prevent an issue. Swag, pad etc with your stops and tables as always... know in most cases as long as you have not done anything stupid to start with, shaving a little time off your shallow stops if it has been an uneventful dive or adding a couple minutes will probably not make a big difference unless your doing some of the crazy s*)(#& that a select few on this list do....
Dive Safe.... and back to the entertainment!
M