Garmin 210 - Manual (Page 55)

available in the review window by highlighting the navaid with the cursor.
Waypoint names and lat/lon labels cannot be displayed unless the waypoints
or lat/lon grid options have been selected. The lat/lon grid will always appear
in Overzoom and No Map modes, regardless of the configuration selection.
The map display configuration window also features a map calibration soft-
key to provide access to a user-defined map correction function. This function
allows you to calibrate the map display to match your exact physical position
(see the Selective Availability warning below) or correct data from older charts.
If your GPSMAP is not providing an accurate display of your position
(within the estimated position error noted on the status page), check to see that
your GPSMAP datum matches the datum on the government charts you are
using (see Section 10 for selecting a map datum). To calibrate the map display,
you must know exactly where you are, and understand that the correction is
generally valid only in a limited range from the point of correction. You
should also only perform a map calibration when your boat is not moving.
The maximum correction is 16,400 feet (5000m). Note that all map calibration
offsets will stay in effect until they are cancelled!
To perform a map calibration from the map configuration window:
1. Press the MAP CAL softkey.
2. Use the # key to move the arrow cursor from the satellite position (indicated
by the satellite icon) to your exact position. The bearing, distance, and horizon­
tal and vertical offset will be indicated at the top of the data window, with the
position coordinates indicated in the position field.
3. Press ® to confirm the offset, EXIT to return to the configuration window.
4. To cancel a map calibration offset, press the MAP CAL softkey. When the map
display appears, press the CANCEL softkey, followed by the EXIT softkey.
M f i p QtlihnilwHS
SECTION
9
0
CALDA BAHK
Cursor and EHT at actual position
I i\ i\ 1C X 2
WARNING!
The map calibrationfunction is valid only in
a limited range. The further you are away
from the point of correction, the larger the
position error will be. Keep in mind that
Selective Availability can cause position
errors up to 330 feet (100 m).
The map calibrationfunction should NEVER
be used to attempt SA corrections. Any incor­
rect use of the calibrationfunction can seri­
ously affect the accuracy of your unit.
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