Algorithms

[Doppler]

Another request for information.

The question is primarily aimed at experienced decompression divers who regularly conduct dives that net decompression obligations that exceed bottom times.

Thanks

DD

 

[WreckWriter]

I prefer VPM, through V-Planner. Deco pretty much always exceeds BT.


WW

 

[WYDT]

I assume you've seen GI's deco explanation?....

This site has a lot of good links to them... if you can stand the blue on black colors....

http://www.diveventures.com/Techinfo.htm

 

[Doppler]

WYDT once bubbled...
I assume you've seen GI's deco explanation?....

This site has a lot of good links to them... if you can stand the blue on black colors....

http://www.diveventures.com/Techinfo.htm

I'm not sure why you'd assume that, but I've known George for a while and am aware of most of the practices his group has adopted and developed over the past seven or eight years. I will look up the site and read when I have a chance.

I am more interested in the results of a simple straw poll to get a sense of what the tech community as a whole are using and if this small sample here indicates congruence with the larger trend. Although we don't have access to a captive test group diving a standardized profile on standardized gases, I think the results may be useful... in fact the sample group may be more valid because of the apparant variety of users on this chat group.

thanks

DD

 

[Divesherpa]

I was Buhlman, but now I'm bubble. I feel much better after the dive and enjoy the deco much more. I've finally converted to 30 second stops and it really helps.

 

[WYDT]

Doppler once bubbled...


I'm not sure why you'd assume that, but I've known George for a while and am aware of most of the practices his group has adopted and developed over the past seven or eight years. I will look up the site and read when I have a chance.

I am more interested in the results of a simple straw poll to get a sense of what the tech community as a whole are using and if this small sample here indicates congruence with the larger trend. Although we don't have access to a captive test group diving a standardized profile on standardized gases, I think the results may be useful... in fact the sample group may be more valid because of the apparant variety of users on this chat group.

thanks

DD

Yes, it would definitely be interesting.... one thing of particular interest on that site I linked to are graphs that show the difference in the deco curves between what George does and what the software calls for. I believe the software in this case is decoplanner using Bulhman ZHL 16b though the gradient factors used are not given.

DSAO!

 

[MikeFerrara]

Question...

GI says the 20 ft stop plus the ascent should at least equal your bottom time. None of the profiles given seem to do it that way. What am I missing? How is he figuring his time at 20 ft? On the 170ft foe 20 min he is only spending like 10 min. The 130ft foe 45 min also seems to have a 20 ft stop and ascent far shorter than the bottom time. I'm comfused.

I currently use D-plan. I like Vplanner but I am not going to carry a lap top. The palm is the way to go. We make some alterations to the schedule like shortening stops before gas switches but I don't change the 20 ft stop much for the reasons stated above.

 

[Doppler]

MikeFerrara once bubbled...
Question...

GI says the 20 ft stop plus the ascent should at least equal your bottom time. None of the profiles given seem to do it that way. What am I missing? How is he figuring his time at 20 ft? On the 170ft foe 20 min he is only spending like 10 min. The 130ft foe 45 min also seems to have a 20 ft stop and ascent far shorter than the bottom time. I'm comfused.

I currently use D-plan. I like Vplanner but I am not going to carry a lap top. The palm is the way to go. We make some alterations to the schedule like shortening stops before gas switches but I don't change the 20 ft stop much for the reasons stated above.

Mike: someone else may be able to interpret George's advice... I can't because I haven't read the latest stuff from WKPP... can you cite the place from which you drew your quote?

Mike, you might also be interested to know that v-planner is available for the Palm. I do carry a laptop with me -- hey, look what I do for a living, I'm a nerd -- but find the palm version is handy to have if I need any more info than is in my Wetnotes...

Take care... hope someone can give you an answer

DD

 

[MikeFerrara]

The info I have is right from the WKPP site and is also on the site that WYDT provided. I think his explaination is clear enough but the example profiles don't seem to match at least as far as the 20 ft stop and ascent to the surface.

I'll have to get the palm version of Vplanner.

 

[O-ring]

MikeFerrara once bubbled...
The info I have is right from the WKPP site and is also on the site that WYDT provided. I think his explaination is clear enough but the example profiles don't seem to match at least as far as the 20 ft stop and ascent to the surface.

I'll have to get the palm version of Vplanner.

If it does, we can post it..