[PATCH] User documentation - describe the dive profile

Dirk Hohndel dirk at hohndel.org
Mon Feb 25 07:43:29 PST 2013

Thanks for doing that!

I committed as is and then added a second commit to correct a few
details. Most importantly: the coloring of the profile is NOT relative
to your average vertical speed - there are absolute thresholds that
determine the color (and they are different for ascent and descent.


Miika Turkia <miika.turkia at gmail.com> writes:

> Signed-off-by: Miika Turkia <miika.turkia at gmail.com>
> ---
>  Documentation/user-manual.txt |   50 +++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 50 insertions(+)
> diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt
> index 7e04c62..acd9981 100644
> --- a/Documentation/user-manual.txt
> +++ b/Documentation/user-manual.txt
> @@ -70,6 +70,56 @@ The screen is divided in 3 area's (shown below with test dives loaded):
>  image::images/main_window.png["The Main Window",align="center"]
> +[[S_DiveProfile]]
> +Dive Profile and Included information
> +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> +
> +The dive profile show on main screen is loaded with information.
> +However, a great effort is given to keep the profile simple, yet
> +informative.
> +
> +The main information of the dive profile is the depth graph. On top of
> +the obvious information of the depth it shows also the ascent and
> +descent rate compared to average (or recommendation). This information
> +is given using different colors. Dark red means the ascent or descent
> +rate is faster than average, dark green means slower than average and
> +yellow / light green is close to average. The depth graph includes also
> +depth readings for the peaks in the graph. Thus you should see the
> +depth of the deepest point and other peaks. Average depth is marked with
> +a horizontal red line.
> +
> +The air consumption graph displays the tank pressure and its change
> +during the dive.  The air consumption takes depth into account so that
> +even when manually entering the start and end pressures the graph is not
> +a straight line. Similarly to the depth graph the tank pressure
> +gives you information of the SAC rate when using air integrated dive
> +computer. Same color coding is used with dark red being faster and dark
> +green slower air consumption than average.
> +
> +Water temperature is displayed with its own blue line with degree
> +markings placed adjacent to significant changes.
> +
> +It is also possible to zoom in the profile graph. This is done by the
> +left mouse button and zoom area can be changed by moving the mouse while
> +the button is pressed down. There is also a toggle zoom under the 'Log'
> +menu that changes the scale of the dive to fill the whole area, useful
> +especially for free divers.
> +
> +[[S_TecDiveProfile]]
> +Tec Information in Dive Profile
> +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> +
> +The dive profile can include Tec settings. Enabling these is described
> +in chapter <<S_SettingUpPreferences,Setting up Preferences>>. Basically
> +you can include graphs of accumulated pO2, pN2, pHe. These graphs are
> +added below the profile data. On top of the profile the currently used
> +gradient factors are shown (e.g. GF 35/75).
> +
> +The graph can also include both the dive computer reported ceiling and
> +our calculated ceiling. Because of the differences in used algorithms it
> +is unlikely that both of these are the same. It is even quite common
> +that Subsurface calculates ceiling for non-decompression dives when the
> +dive computer was not in deco mode during the dive.
>  [[S_ImportNewDives]]
>  Import New Dives from your Dive Computer
> -- 
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