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GPSMAP 2106/2110 Owner’s Manual 61
MAIN MENU > SYSTEM TAB
your present location and provides magnetic north heading references
based on the variation you enter.
WARNING: If you select User Mag Var, you must periodically update the
magnetic variation as your location changes. When using this setting, the
GPSMAP 2106/2110 unit does not automatically calculate and update the
magnetic variation at your present location. Failure to update this setting can
result in substantial differences between the information displayed on your unit
and external references, such as a magnetic compass.
To enter a user-defined magnetic variation:
1. With the Heading field set to User Mag Var, highlight the heading
reference field (immediately to the right), and press ENTER.
2. Enter the magnetic variation at your current location, and press ENTER.
Time Sub Tab
Use the Time sub tab to adjust the time format, enter a time zone, and adjust for
daylight saving time to show the correct local time.
The following options are available:
• Time Format—select 12 Hour, 24 Hour (military), or UTC (also called
Greenwich Time) time format.
• Time Zone—select your time zone to show correct local time or enter a
UTC Offset (how many hours you are ahead or behind the time line).
• Daylight Saving Time—select Auto, On, or Off to adjust for daylight
saving time.
Comm (Communications) Sub Tab
The Comm sub tab controls the input/output format used when connecting your
GPSMAP 2106/2110 to external NMEA devices or a personal computer. The unit
supports two input/output ports.
NOTE: See the GPSMAP 2106/2110 & GPS17 Installation Instructions for
more information on wiring and NMEA information.