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Legacy OSTC's 
What is the GF displayed in surface mode?
Posted by: edhowarth ()
Date: October 25, 2014 07:28PM

When I do a dive on a high GF of 80 for example, after I have surfaced I get a slowly reducing GF shown on the surface mode screen. That I can understand, but why does it start off higher than 80%
Surely if I haven't broken 80% on the ascent, it can't be higher than that after 10 minutes on the boat.
The only thing I can think of is that the figure shown on the surface mode screen is the percentage of the set GF. So if it shows 85, that is 85% of 80, ie 65%.

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Re: What is the GF displayed in surface mode?
Posted by: sailor ()
Date: October 26, 2014 10:59AM

Hi,

maybe the GF80 refers to the last deco stop?
So if you are at 80% on 3 meters it will be a little more on the surface?
How high did the GF display go after surfacing?

Reiner



Edited 2 time(s). Last edit at 10/26/2014 10:04PM by sailor.

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Re: What is the GF displayed in surface mode?
Posted by: heinrichsweikamp ()
Date: October 27, 2014 12:32PM

Hi,

Which percent do you talk of? The one in the tissue diagram or the "GF:" surface information?

regards,
Matthias

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Re: What is the GF displayed in surface mode?
Posted by: edhowarth ()
Date: October 27, 2014 10:39PM

heinrichsweikamp Wrote:
-------------------------------------------------------
> Hi,
>
> Which percent do you talk of? The one in the
> tissue diagram or the "GF:" surface information?
>
> regards,
> Matthias

The GF surface information.

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Re: What is the GF displayed in surface mode?
Posted by: heinrichsweikamp ()
Date: October 28, 2014 11:21AM

Hi,

In surface mode the OSTC computes your tissues in the non-gf model so this GF info is the relative factor (As you guessed above) to GF_High. Any value>100 means you have missed a decostop.

regards,
Matthias

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Re: What is the GF displayed in surface mode?
Posted by: edhowarth ()
Date: October 28, 2014 05:20PM

Fantastic. Thanks for your help, Matthias.

Regards

Ed

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