Gradient Factor for Dummies

***Louby Lou*** · 27th May 2006, 21:16

Hi All

UWSojourner aka Kevin Watts has kindly written another article which has has submitted to the library

Gradient Factors for Dummies is now up and running and can be found HERE

The article attempts to provide a user's view of gradient factors, an Erik Baker derived method of calculating decompression schedules.

As usual, please use this thread for feedback, comments and questions and the article can be used for reptuation.

Thanks again Kevin

Cheers

Miss Lou

Mdemon · 28th May 2006, 08:21

OK, that's an extremely clear explanation of GF's - this Dummy found it easy to understand!

Nice article. Thanks.

(So, VPM and RGBM for Dummies next then?

)

NickK · 28th May 2006, 09:18

Quote: (Originally Posted by Mdemon)

OK, that's an extremely clear explanation of GF's - this Dummy found it easy to understand!

Nice article. Thanks.

(So, VPM and RGBM for Dummies next then?

)

Very true. Nice job Kevin, thank you.

How about VPM (B/E) and RGBM for Dummies?

Brst regards,

Nick

Bazza · 29th May 2006, 00:28

Nice and simple to understand, Kev can I use this in my classes ???

regards Baz

**UWSojourner** · 29th May 2006, 03:54

Quote: (Originally Posted by Bazza)

Nice and simple to understand, Kev can I use this in my classes ???

regards Baz

Sure. I hope you find it useful.

pia · 1st June 2006, 00:00

Yes, a really nice one. Thank you. VPM and RGBM would be very interesting, too.
Tommi

01RMB · 1st June 2006, 01:50

Great article.

Here is a diagram I put together for a previous post on gradient factors. It shows a decompression profile with GF 15/85 (low/high) so starting the decompression at 15% above the minimum off gassing level and finishing the decompression at 85% of the maximum decompression surfacing level.

GF diagram.jpg

Craig69 · 1st June 2006, 12:47

Thanks Kevin,

Thats really helped clarify the subject.

pbsouthwood · 1st June 2006, 19:36

Hi Kevin,
A nice clear explanation of what a gradient factor is and how it is applied. How about an explanation of why the ratios should be chosen to have a gradient from low at depth to high in shallow water and not the other way round?
Cheers,
Peter

decoweenie · 1st June 2006, 20:32

Quote: (Originally Posted by pbsouthwood)

How about an explanation of why the ratios should be chosen to have a gradient from low at depth to high in shallow water and not the other way round?

Take a look at the graph on post #7, it answers your question very well.

Just imagine changing the GF line from "15/85" to "85/15".

27th May 2006, 21:16	#1 (permalink)
*Louby Lou* XLVI WC! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: Roman Corinium! Posts: 1,019	Gradient Factor for Dummies Hi All UWSojourner aka Kevin Watts has kindly written another article which has has submitted to the library Gradient Factors for Dummies is now up and running and can be found HERE The article attempts to provide a user's view of gradient factors, an Erik Baker derived method of calculating decompression schedules. As usual, please use this thread for feedback, comments and questions and the article can be used for reptuation. Thanks again Kevin Cheers Miss Lou __________________ Miss Lou x Use of Rebreather World is subject to the Rebreatherworld Terms and Conditions - Please read! Outlaw Divers - Sssh we're diving! You heff vays uff dealink vis zem, oh Miss Rebreather World Admin! - Rob Davie Feb 06
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28th May 2006, 08:21	#2 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,927	Re: Gradient Factor for Dummies OK, that's an extremely clear explanation of GF's - this Dummy found it easy to understand! Nice article. Thanks. (So, VPM and RGBM for Dummies next then? ) __________________ www.southwestmafia.com "small minds talk about people, Average Minds Talk About Events, GREAT MINDS TALK ABOUT IDEAS!" The WRONG Attitude will get you killed. "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
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28th May 2006, 09:18	#3 (permalink)
NickK New Member Current Rebreather/s: Evolution Other Rebreather/s: Evolution Join Date: Nov 2005 Location: Vancouver Island Posts: 90	Re: Gradient Factor for Dummies Quote: (Originally Posted by Mdemon) OK, that's an extremely clear explanation of GF's - this Dummy found it easy to understand! Nice article. Thanks. (So, VPM and RGBM for Dummies next then? ) Very true. Nice job Kevin, thank you. How about VPM (B/E) and RGBM for Dummies? Brst regards, Nick
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29th May 2006, 00:28	#4 (permalink)
Bazza New Member Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution rEvo Other CCR Dolphin Other Rebreather/s: Prism Topaz Sport Kiss Classic Kiss MK 15.X rEvo Other CCR Dolphin Join Date: Feb 2005 Location: Australia Posts: 167	Re: Gradient Factor for Dummies Nice and simple to understand, Kev can I use this in my classes ??? regards Baz
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29th May 2006, 03:54	#5 (permalink)
UWSojourner Pacific Northwest Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Feb 2005 Location: Portland Oregon Posts: 556	Re: Gradient Factor for Dummies Quote: (Originally Posted by Bazza) Nice and simple to understand, Kev can I use this in my classes ??? regards Baz Sure. I hope you find it useful.
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1st June 2006, 00:00	#6 (permalink)
pia New Member Current Rebreather/s: Inspiration Classic Evolution Ray Other Rebreather/s: Ray Join Date: May 2006 Location: Germany Posts: 1	Re: Gradient Factor for Dummies Yes, a really nice one. Thank you. VPM and RGBM would be very interesting, too. Tommi
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1st June 2006, 01:50	#7 (permalink)
01RMB Evolving Current Rebreather/s: Evolution Other Rebreather/s: Join Date: May 2005 Location: Brisbane, Australia Posts: 190	Re: Gradient Factor for Dummies Great article. Here is a diagram I put together for a previous post on gradient factors. It shows a decompression profile with GF 15/85 (low/high) so starting the decompression at 15% above the minimum off gassing level and finishing the decompression at 85% of the maximum decompression surfacing level. GF diagram.jpg __________________ Cheers Rod Last edited by 01RMB : 1st June 2006 at 03:02. Reason: Corrected diagram labelling
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1st June 2006, 12:47	#8 (permalink)
Craig69 Custom Title Allowed! Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Jun 2005 Location: Barnsley, South Yorkshire (Gods Own County), England. Posts: 123	Re: Gradient Factor for Dummies Thanks Kevin, Thats really helped clarify the subject. __________________ Craig. www.thornebsac.co.uk
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1st June 2006, 19:36	#9 (permalink)
pbsouthwood New Member Current Rebreather/s: Other SCR Other Rebreather/s: Other SCR Join Date: Sep 2005 Location: South Africa Posts: 10	Re: Gradient Factor for Dummies Hi Kevin, A nice clear explanation of what a gradient factor is and how it is applied. How about an explanation of why the ratios should be chosen to have a gradient from low at depth to high in shallow water and not the other way round? Cheers, Peter
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1st June 2006, 20:32	#10 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,487	Re: Gradient Factor for Dummies Quote: (Originally Posted by pbsouthwood) How about an explanation of why the ratios should be chosen to have a gradient from low at depth to high in shallow water and not the other way round? Take a look at the graph on post #7, it answers your question very well. Just imagine changing the GF line from "15/85" to "85/15".
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