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I have just been catching up with some of the interesting material in the "Sample Deco Dive - 220 for 25" thread (I've been busy so haven't read it all yet). I haven't yet seen the Decoplanner software but what i am wondering is how the gradient factors in that program relate to those in 'GAP'. JJ refers to figures such as 10-30, 40-60 etc. In GAP the gradient factors are in terms of decimals (between 0 and 1.0). Is there a simple relationship between these figures (such as a factor of 100) eg 0.2 on GAP is equivalent to 20 on decoplanner? So when JJ recommends starting with 30 low and 80 high can this be translated to 0.3 low and 0.8 high on GAP? Forgive me if this is a stupid question, or I have got it entirely wrong, but the gradient factors concept is new to me. Another question, while I am at it. Setting the low gradient factor to a smaller number (eg 0.1 on GAP) gives deeper stops, but I presume that even the deepest of stops given on these programs is still in the theoretical "deco zone"? Judging by the quick example I worked out last night for a 50m dive 0.1 gave the deepest stop at around the same point as the 'Pyle' method. Would this be generally true, or are some people thinking that 'Pyle' stops may be a little too deep? Also why choose (ie what advantages/disadvantages in choosing) the deep stops to start shallower if you can do deeper stops that are still in the "deco zone"? Thanks for any advice, Dave. -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Ocean Internet - "The Quality ISP" http://www.ocean.com.au/info.html -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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