Gps Settings; Sensors Settings; Compass Settings; Calibrating The Compass Manually - Garmin FORERUNNER 255 Series Owner's Manual

GPS Settings

You can change the GPS settings to customize the satellite systems used for each activity. For more
information about satellite systems, go to www.garmin.com/aboutGPS.
TIP: The GPS settings can impact battery life
Hold UP, select Activities & Apps, select an activity, select the activity settings, and select GPS.
NOTE: These settings are not available for all activities.
Off: Disables satellite systems for the activity.
GPS Only: Enables the GPS satellite system.
All Systems: Enables multiple satellite systems. Using multiple satellite systems together offers increased
performance in challenging environments and faster position acquisition than using GPS only.
All + Multi-Band: Enables multiple satellite systems on multiple frequency bands. Multi-band systems use
multiple frequency bands and allow for more consistent track logs, improved positioning, improved multi-
path errors, and fewer atmospheric errors when using the watch in challenging environments.
UltraTrac: Records track points and sensor data less frequently. Enabling the UltraTrac feature increases
battery life but decreases the quality of recorded activities. You should use the UltraTrac feature for activities
that demand longer battery life and for which frequent sensor data updates are less important.

Sensors Settings

Compass Settings

Hold UP, and select Sensors & Accessories > Compass.
Calibrate: Allows you to manually calibrate the compass sensor
Display: Sets the directional heading on the compass to letters, degrees, or milliradians.
North Ref.: Sets the north reference of the compass
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

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 UP.
2 Select Sensors & Accessories > Compass > Calibrate.
3 Follow the on-screen instructions.
TIP: Move your wrist in a small figure eight motion until a message appears.

Setting the North Reference

You can set the directional reference used in calculating heading information.
1 Hold UP.
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, enter the magnetic variance, and select Done.
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(Battery Life Information, page
(Calibrating the Compass Manually, page
(Setting the North Reference, page
NOTICE
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Customizing Your Device
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