(Managed to send this email to Dirk only from my cell, so i re-send it here)
On 19 June, 2015 - Dirk Hohndel wrote: > On Fri, Jun 19, 2015 at 07:57:56PM +1000, Rick Walsh wrote: > > > Yes, if there is a minimum stop time in the calculated profile, the issue > > of 0min stops goes away - it makes executing the dive as well as outputting > > the plan easier. An alternative (option) would be to postpone the gas > > switch until the first deco stop as Anton prefers. > > No, please don't do that. It would make Subsurface a lot less useful for > divers trained differently. Given the way I tend to do my tech dives, > having the 1 minute stop in my plan wouldn't make any difference. Not > being able to switch to the deco gas fairly deep would be a deal killer. > For me it doesn't matter. The plan is still the same. (Yea, maybe a minute or two on the runtime, but that's still less than the difference between plan and reality.) > The site where we are teaching new tech divers is a shore diving site with > a fairly gradual slope. It takes quite a while to come up because you need > to cover a fair bit of horizontal difference. You actually WANT to change > to your first deco gas around its MOD. > In such a case i agree. Switch at mod. The difference is if you're just accending or if you're swimming. The swimming case is a way slower accent, so the earlier switch matters. Most/all of my deep diving is done on wrecks with just a shot line. Then it makes no sens stopping before just for a gas switch. I checked some logs and with the ruler measured our average accent speed on the first leg, and we're usually doing 10-15 m/min on our way to the fist stop. On a sandy-slope-dive we managed to reach 5 m/min accent speed and we where swimming like crazy up from 60m. //Anton -- Anton Lundin +46702-161604 _______________________________________________ subsurface mailing list [email protected] http://lists.subsurface-divelog.org/cgi-bin/mailman/listinfo/subsurface
