Rainer
Contributor
Until now! Just need a PC and internet connection: EtherFill 5000 Cylinder Fill System - Dive Gear Express
Do you need computer at all?
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Until now! Just need a PC and internet connection: EtherFill 5000 Cylinder Fill System - Dive Gear Express
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Blackwood
Contributor
memorex77
Contributor
That's understood and preferred. My main issue with this is the descent as well as the ascent.. Where I'm normally diving I have to follow the profile of the lake to get to where I want to go. Eg. steep wall to 40m, rather shallow to 60m, and back again. Calculating correct profiles is difficult, and sticking to the calculated ascent rates even more!
This is a major complication, while I find following the calculated ascent rates VERY difficult to follow anyway. :depressed: For me, a dive computer seems to be advantagous!
How are you handling this?
Blackwood
Contributor
Me personally?
I calculate my deco schedule on the fly based on the actual profile using a technique often called Ratio Deco. I know from experience how long my deco gas will likely last and will adjust my bottom profile accordingly. If I were doing that (steep to 40, shallow to 60), I'd consider how long it's taking me to swim along the slope and determine when to turn around based on that time and the average depth (in this case probably 55m assuming some time spent at 60). The local shore dive here is similar in that respect. It takes 'forever' to get to depth (unless I'm scootering, I make about 3 vertical feet per minute at a leisurely pace), and thus you either have to ascend and swim towards shore in midwater, or you turn around halfway through your max bottom time (based on gas supply, adjusted for depth).
Contingency plans for plus minus 5 and 10 minutes and plus minus 5 and 10 feet. You also need to understand that some take the attitude that unless a problem happens right at the beginning of the dive you may have to decide between getting both you and your buddy to the surface or just you safely. I do not expect my buddy to risk his life for me if I am stupid either and overstay my plan.
Rainer
Contributor
You seriously cut tables for 5' increments? Why???
LiteHedded
Contributor
i carry tables with a range of bottom times and depths. SHTF scenarios beyond that I would use ratio deco.
no you don't need a computer
no you don't need a computer
Nope, I know how deep my wrecks are and unless I bring a shovel, I'm not going any deeper. Time is the variable.
Because v-planner lets me do it! Takes less than a minute and I have this personal thing about being precise on those types of dives. I also may alter the conservatism settings. I like +2 on my usual stuff. Colder water, bad vis, any kind of current and I may use +3 or even +4. That is just me. I'm 50 yrs old, not bullet proof, and it's more about the quality of the dive itself than the amt of time I spend.
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