Shearwater Petrel EXT, Operation Manual, Page: 50 / 65

Shearwater Research Inc. Revision 1.1.0 50
Shearwater Petrel
‣
OC Gases
1 OC On
2 OC Off
3 OC Off
4 OC Off
5 OC Off
Next Edit
21/OO
OO/OO
OO/OO
OO/OO
OO/OO
‣ CC Gases
A1 CC On
2 CC Off
3 CC Off
4 CC Off
5 CC Off
Next Edit
21/OO
OO/OO
OO/OO
OO/OO
OO/OO
Deco Setup
Deco Model
May just show Bühlmann ZHL-16 with gradient factors model, or it
may allow you to switch between GF and various types of VPM-B� The
choices will be available if you have unlocked VPM-B�
Conservatism
Can be adjusted in either the GF or VPM model�
For a more detailed explanation of their meaning for the GF algorithm,
please refer to Erik Baker’s excellent articles: Clearing Up The
Confusion About “Deep Stops” and Understanding M-values. The
articles are readily available on the web� VPM-B has conservatism
settings from 0 to +5, with higher numbers being more conservative�
Last Stop
Allows you to chose where to do your last stop� The choices
are 10ft/3m and 20ft/6m� Note that this setting does not affect
decompression� It only makes the TTS prediction more accurate�
NDL Display
These options were previously covered in the Dive Setup+ section�
OC Gases
The next submenu is OC Gases� This menu allows the user to edit the
open circuit gases� The options contained here are the same as those
in the “Define Gases” subsection of the “Dive Setup” section contained
earlier in this manual. The interface conveniently displays all five gases
simultaneously�
For a description of how to appropriately set each gas, please see the
above Define Gas section
CC Gases
The next submenu is CC Gases� This menu allows the user to edit the
closed circuit diluent gases� The options contained here are the same
as those in the “Define Gases” subsection of the “Dive Setup” section
contained earlier in this manual� The interface conveniently displays all
five gases simultaneously.
For a description of how to appropriately set each gas, please see the
above Define Gas section
‣ Deco Setup
Deco Model
Conserv(GF)
Last Stop
Next Edit
GF
3O/7O
6m
NDL Display CEIL