Section 3
Waypoint and Database Information
The GNC 250 uses a Jeppesen NavData® card to provide position and facility infor-
mation 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 250’s internal memory.
Waypoint information is available through four primary waypoint pages accessible
from the GNC 250’s WPT key. The waypoint pages may be scrolled through by pressing
the WPT key and rotating the outer knob until the desired page is displayed, or by
pressing the WPT key repeatedly.
33
REFERENCE
Airport
Communication
Please note that your GNC 250 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
1000 Sherbrooke, Suite 400
Montreal, Quebec
Canada H3A 2R2
Waypoint Menu Page
Proximity Waypoints Page
User Waypoint List
Waypoint Comments List
SECTION
3
WPT KEY
Overview
250 real 7/14/98 9:32 AM Page 33
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