Garmin GPSMAP 196 - Manual (Page 103)

Selecting a Different Heading Reference
You can select from Auto Mag Var, True, Grid, and User Mag
Var. Auto Mag Var provides magnetic north heading references
that are automatically determined from your current location. True
provides headings based on a true north reference. Grid provides
headings based on a grid north reference (and is used in conjunction
with the grid position formats).
User Mag Var allows you to specify the magnetic variation at your
current location and provides magnetic north heading references
based on the variation you enter. Enter the magnetic variation of
your current location in the Magnetic Variation field if you have
selected User Mag Var for the heading.
WARNING: If User Mag Var is selected, the unit does not
automatically calculate and update the magnetic variation at
your present location. You must update the magnetic variation as
your location changes. Failure to update this setting can result
in substantial differences between the information shown on your
unit and external references, such as a magnetic compass.
Interface Sub Tab
The Interface sub tab controls the input/output format used when
connecting your unit to external devices. To open the Interface sub
tab, press MENU twice to open the Main Menu. Select Setup from
the vertical tab list. Highlight and select the Serial Data Format you
want.
Interface Sub Tab
Serial Data Format—sets the data format to one of the following:
• Garmin Data Transfer—the proprietary format used to
exchange data with a PC or another Garmin GPSMAP 196.
GPSMAP 196 Pilot’s Guide 95
M
AIN
M
ENU
> S
ETUP
T
AB