Compass Settings
Hold MENU, and select Sensors & Accessories > Compass.
Calibrate: Allows you to manually calibrate the compass sensor (Calibrating the Compass Manually, page116).
Display: Sets the directional heading on the compass to letters, degrees, or milliradians.
North Ref.: Sets the north reference of the compass (Setting the North Reference, page116).
Mode: Sets the compass to use electronic-sensor data only (On), a combination of GPS and electronic-sensor
data when moving (Auto), or GPS data only (Off).
Calibrating the Compass Manually
NOTICE
Calibrate the electronic compass outdoors. To improve heading accuracy, do not stand near objects that
influence magnetic fields, such as vehicles, buildings, and overhead power lines.
Your watch was already calibrated at the factory, and the watch uses automatic calibration by default. If you
experience irregular compass behavior, for example, after moving long distances or after extreme temperature
changes, you can manually calibrate the compass.
1 Hold MENU.
2 Select Sensors & Accessories > Compass > Calibrate.
3 Select an option:
• To perform a calibration that rotates the watch through all orientations, select Full Calibration.
• To perform a short calibration that rotates the watch in a figure eight motion, select Quick Calibration >
Start.
NOTE: The Full Calibration option provides better accuracy for diving. The Quick Calibration option is
suitable for other activities.
4 Follow the on-screen instructions.
Setting the North Reference
You can set the directional reference used in calculating heading information.
1 Hold MENU.
2 Select Sensors & Accessories > Compass > North Ref..
3 Select an option:
• To set geographic north as the heading reference, select True.
• To set the magnetic declination for your location automatically, select Magnetic.
• To set grid north (000º) as the heading reference, select Grid.
• To set the magnetic variation value manually, select User > Mag. Variation, enter the magnetic variation,
and select Done.
Altimeter and Barometer
The watch contains an internal altimeter and barometer. The watch collects elevation and pressure data
continuously, even in low-power mode. The altimeter displays your approximate elevation based on pressure
changes. The barometer displays environmental pressure data based on the fixed elevation where the altimeter
was most recently calibrated (Altimeter Settings, page117).
116 Sensors and Accessories
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