Quote:
| Originally Posted by JohnD I know all about PC based planning programs such as Zplanner/Vplanner, but if you just dive using the Vytec on Air/nitrox mode (not as guage) how do you pick your depths? |
I dived a Vytec for a while on deep air and trimix up to 30% He using two deco gas's. I planned the dive using Decoplanner on a 20/80 GF and did the deep and intermediate
stops recommended by Decoplanner then cleared the Vytec on the shalow stops. Ocasionaly the Vytec would throw in a stop so I would just clear that to. I found little diferance on a square profile dive between the VR3 on 0 safety and the Vytec. The vytec was slightly more conservitave adding about 3 -6mins to the deco on a 45min bottom time at 45-50m using the Nitrox setting on say 23/25Mix.
Deeper than 50 I used tables because I was using more than 30% He in the mix.
This worked fine FOR ME and it was only when 50+ became a regular occurance that I switched to tables then on to a VR3.
The VR3 often gives big jumps in deco stops but I ignore them and just addd my own stops. Today with 60mins at 30 -36m it gave me2 @ 21 4 @ 14m and 5 at 4.5 so I added stops at 18m 12m 10m and 6m
The diferance with the VR3 is it will credit you for this and reduce the 6m stop. The Vytec will not credit you unless you are at or close to its recommended stop depth. It will often ADD deco if you add deep stops.
Be prepaired to do more deco than expected when you leave the bottom and its fine.
ATB
Mark Chase