Chopper
New
This may be old question, but I'm new user, so go easy on me!I have read with much interest all the 2003 discussion about the Suunto RGBM and it has answered many of my questions. I came along looking for answers as to the following: I noticed when using my Suunto Vyper for deco dives that it was bringing me up very shallow to deco, ie. typically giving me 3m ceiling for anything in the 30-40m range. This seems to be contrary to my understanding, in that RGBMs should introduce deep stops to smooth out the deco profile. I now learn that this recreational RGBM is not the full implementation and its mainly for divers who avoid necessary deco. Im not happy with such a shallow ceiling, and generally ascend slowly and stop deeper than the computer says. Funnily, enough, buried in the small print in the Vyper instruction booklet, it recommends deco-ing at below 4m!! Well, I thought, no matter. Ill follow the decompression floor which should allow me to off-gas more slowly whilst staying a bit deeper. According to the instructions, the floor is represented by the upward pointing arrow (ie. the lower half of the hourglass icon), which disappears when you enter the deco zone. The deco zone should start when the leading tissue reaches a sufficiently low ambient pressure to begin off-gassing. Well following the Vyper, this doesnt seem to be the case, since the floor seems to be not much below the ceiling ie. about 6m. This is very misleading as it represents the most efficient deco zone and not the real floor at all. In fact, when I analysed some dive profiles using the desktop software, it seems that the leading fast tissues start off-gassing and the slow tissues stop on-gassing about where youd expect them to, ie. about where you would put in the first deep stop, which is half the maximum depth minus the first stop ( about 15m for a 35m dive). Presumably this is at or close to the real floor. OK, so the Suunto RGBM is not the full implementation, as it doesnt put in the deep stops. It seems that for the most part the modifiers affect what happens on the surface and for following dives in a series rather than actually modifying the dive profile itself. Thats fine, I still thing RGBMs are the way forward, but can anyone tell me what would happen if, using the Vyper in normal air/nitrox mode I put in the deep stops ? Would it penalise me unduly ? or is a foolhardy thing to do given the way it works ? Should I use it in Gauge mode for serious dives and use dissolved gas tables with gradient factors or go out and buy a new one with the full RGBM ?? I guess I'm a bit behind the times, but the full RGBM models came out last year, right ?
Cheers,
Cheers,
