Rebreather World - View Single Post - setting pri and sec handsets differently???

***jradomski*** · 10th December 2007, 02:30

Quote: (Originally Posted by Dsix36)

Yesterday I did a dive of 2hr 15min at an average depth of 68'. I have always run my GF at 10/100 and stayed alive (awfully tired and my knees ached that night).
Yesterday I ran my primary GF at 25/85 and my secondary at 10/100. At 1hr 36min into the dive my primary was showing 4min of deco (first stop at 20') and the secondary was showing 38min (first stop at 50').
I set the dil to 21/35 on both handsets. I checked the setting at depth and after the dive. Everthing seems to be right.
Anyway I did the longest deco to be safe (not tired or achy knees last night), but I can't believe that these are right.
I thought that the first number in a GF would put the first stop deeper as the number was smaller. Is this not correct? It seems to me that 10/100 should have had deeper stops and got me out of the water sooner than 25/85.
Any help or advise will be appreciated. I am not a rocket scientist (yet) but I thought that I understood the principals of GF's
Help, I am sooooooo confused.

ignore the TTS numbers, they are wrong but the deco stops are right.. if you add up your actual stops you will see they are usually ALOT shorter than the predicted TTS.. The deeper you need stops the more deco it will show and the worse the TTS calc is.. as you get closer to the surface the TTS gets closer to the real value..

I will try and get around to posting a profile what the HH thinks the ascent is before you start the ascent..

10th December 2007, 02:30	#10 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Home Build Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Home Build Join Date: Mar 2005 Location: "Da" Bronx Posts: 2,871	Re: setting pri and sec handsets differently??? Quote: (Originally Posted by Dsix36) Yesterday I did a dive of 2hr 15min at an average depth of 68'. I have always run my GF at 10/100 and stayed alive (awfully tired and my knees ached that night). Yesterday I ran my primary GF at 25/85 and my secondary at 10/100. At 1hr 36min into the dive my primary was showing 4min of deco (first stop at 20') and the secondary was showing 38min (first stop at 50'). I set the dil to 21/35 on both handsets. I checked the setting at depth and after the dive. Everthing seems to be right. Anyway I did the longest deco to be safe (not tired or achy knees last night), but I can't believe that these are right. I thought that the first number in a GF would put the first stop deeper as the number was smaller. Is this not correct? It seems to me that 10/100 should have had deeper stops and got me out of the water sooner than 25/85. Any help or advise will be appreciated. I am not a rocket scientist (yet) but I thought that I understood the principals of GF's Help, I am sooooooo confused. ignore the TTS numbers, they are wrong but the deco stops are right.. if you add up your actual stops you will see they are usually ALOT shorter than the predicted TTS.. The deeper you need stops the more deco it will show and the worse the TTS calc is.. as you get closer to the surface the TTS gets closer to the real value.. I will try and get around to posting a profile what the HH thinks the ascent is before you start the ascent.. __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated.
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