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The GARMIN GNC 250XL is a powerful navigational tool that provides pilots with accurate
navigational data and communication capability, along with a host of database information at your
fingertips. The Takeoff Tour is designed to familiarize you with the operation of the GNC 250XL,
including powering up the unit, changing frequencies, entering data and performing a simple
direct-to, and a limited introduction to the ‘Nearest’ functions. In addition, this section also briefly
covers the position, CDI and frequency pages available from the NAV key. These pages will be
used for most of your in-flight navigation.
The Takeoff Tour assumes that the GPSCOM
TM
and antennas have been properly
installed and you have not changed any of the GNC 250XL’s default settings. If you have
changed any of the factory default settings (position format, units of measure, selectable
fields, etc.), the pictures used may not match your configuration. Prior to using your GNC
250XL for the first time, we recommend that you taxi to a location that is well away from
buildings and other aircraft so the unit can collect satellite data without interruption.
Powering up the GNC 250XL
The GNC 250XL’s power and volume are controlled using the
B
(power/volume) knob
at the bottom left of the unit. Rotating it clockwise will turn the unit on and increase the
radio volume. After turning the unit on, a welcome page will be displayed while the unit
performs a self test.
The database page will appear, showing the current database information on the NavData
card, with the valid operating dates, cycle number and database type indicated. The database is
updated every 28 days and is available for one-time or subscription purchase.
To acknowledge the database information:
1. Press the
E key
.
1
The database confirmation page shows the
effective date of the Jeppesen database on the
NavData Card.
The welcome page appears when the GNC 250XL
is turned on. During the time this screen is
displayed, the GNC 250XL performs a self test to
ensure proper operation
TAKEOFF TOUR
Power On
250xl manual 2 7/17/98 1:26 PM Page 1