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Section 3
Waypoint and Database Information
The GNC 250XL uses a Jeppesen NavData® card to provide position and facility
information for thousands of airports, VORs, NDBs and intersections. Each facility in the
database is stored as a waypoint with its own latitude/longitude, identifier (up to five let-
ters and/or numbers), and other pertinent information. Up to 1,000 user waypoints may
also be created and stored in the GNC 250XL’s internal memory.
Waypoint information is available through four primary waypoint pages accessible
from the GNC 250XL’s
W
key. The waypoint pages may be scrolled through by press-
ing the
W
key and rotating the outer knob until the desired page is displayed, or by
pressing the
W
key repeatedly.
37
SECTION
3
WPT KEY
Overview
Please note that your GNC 250XL uses ICAO
identifiers for all airports. All U.S. airport identifiers
which contain only letters use the prefix ‘K’. For
example, Los Angeles International is KLAX under
the ICAO standard. Other airports, such as Otten
Memorial (3VS), that contain numbers in the
identifier, do not require the ‘K’ prefix. Many foreign
countries use two letter prefixes. For more
information on ICAO identifiers, contact:
Document Sales Unit
International Civil Aviation Organization
999 University Street
Montreal, Quebec
Canada H3C 5H7
Waypoint Menu Page
Proximity Waypoints Page
Waypoints with Comments List
User Waypoint List
250xl manual 2 7/17/98 1:27 PM Page 37