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3-6
navigation data. The CDI Page will indicate this condition by displaying “NO
POSN” on line 1 and all navigation data on lines 2 and 3 will be blank. If the
GPS 55 is not navigating to a waypoint, the CDI will indicate this condition by
displaying “NO ACT WP” (no active waypoint) and all navigation data except
speed and track will be blank.
3.6 WAYPOINTS
The GPS 55 contains a public database that provides airport and VOR
locations. Additionally, it allows you to create, store, and use 250 alphanu-
meric user waypoints. A waypoint consists of a name (up to four letters or
numbers), and its latitude/longitude location. You will have the opportunity
to use waypoints extensively while operating the GPS 55. For example, you
can navigate to a waypoint, build a route using waypoints, and perform trip
planning using waypoints.
Waypoint Waypoint Type/Action
Name (APT, VOR, USR,
REN, DEL)
Latitude
Longitude
WAYPOINT DEFINITION PAGE
The Waypoint Definition Page may be displayed by pressing the WPT key.
It allows you to review, create, modify, delete, and rename waypoints.
To create, modify, or review a waypoint
· With the cursor under the waypoint name field, enter the desired
waypoint name.
· If the waypoint does not exist, the waypoint type on line 1 will be
changed to “USR” (indicating user waypoint). You may then enter the
waypoint latitude and longitude on lines 2 and 3 as described in Section
3.3.
· If the waypoint exists, the Waypoint Definition Page will display the
waypoint type (“APT”, “VOR” or “USR”) and its latitude/longitude.
· To modify a user waypoint position, enter the waypoint latitude and
longitude as described above. (NOTE: If a waypoint is being used for
navigation, its position cannot be modified. An attempt to modify the