Page 58
Doc. 13300-REC-RevB (2022-05-02)
Recreational Modes
Operating Instructions
11.7. Display Setup
Depth and Temperature
Depth: Feet or Meters
Temperature: °F or °C
Brightness
See brightness options on page 50�
Altitude
The altitude setting on the Petrel 3 is fixed to Auto in
recreational modes� This indicates that the computer
will automatically compensate for pressure changes
when diving at altitude�
Flip Screen
This function displays the contents of the screen
upside down�
Depth Units Meters
Temp Units °C
Brightness Auto
Altitude
Auto
Flip Screen
Next
Edit
Display Setup
Accurate depth measurements and
decompression calculations require
knowing the ambient atmospheric
pressure at the surface� Regardless
of the turn on method, the surface
pressure is determined the same
way� While in the off state the
surface pressure is measured and
saved every 15 seconds� A 10 minute
history of these pressure samples is
kept� Immediately after turn on this
history is examined and the minimum
pressure is used as the surface
pressure� The surface pressure is then
remembered, and not updated again
until the next turn on�
Determination of Surface Pressure
11.8. Compass
Compass View
The Compass View setting
can be set to the following
options:
Off:
The compass is disabled�
60°, 90°, or 120°:
Sets the range of the compass dial
that is visible on the main screen� The actual amount
of arc that there is room for on the screen is 60°,
so this may feel the most natural� The 90° or 120°
settings allow a wider range to be seen at once� The
default is 90°�
True North (declination)
Enter the declination of current position to correct
compass to true north�
This setting can be set from -99° to +99°�
If matching an uncompensated compass, or
navigation is based on relative directions, then this
setting can be left at 0°�
Compass View
90
Calibrate
True North
+0
Next
Edit
Compass
188°
