Appendix A: Navdata Card Use - Garmin GNC 420 Pilot's Manual & Reference

Appendix A: NavData Card Use

The Jeppesen NavData® card supplied with your GNC 420 can be installed or
removed when the GNC 420 is on or off. Insert the card with the swing arm handle at
the bottom and the label facing to the left (see illustration right). If the NavData card
is not present when the unit is turned on, you will receive a "No Jeppesen Aviation
Database - Limited to user defined waypoints" message on the database confirmation
page. If the NavData card is removed during operation, a "Data card removed-Unit will
restart in 30 seconds" warning. A counter will begin to count down and, if the card is
not replaced within 30 seconds, the GNC 420 will automatically reinitialize. You may
also reinitialize the unit manually by pressing
To insert the NavData card:
1a. Place the card into the NavData card slot, with the label facing to the left and the swing arm
handle at the bottom front.
There are two data card slots on the face of the GNC 420. The
Jeppesen NavData® card should be inserted in the left-most slot. The
second slot is provided for future options and expansion capabilities.
2a. Press the NavData card into place until it seats on the internal connector and the front of the
card is flush with the face of the GNC 420 unit.
3a. If the swing arm handle is up, gently lower the handle and push it into place—flush with the
face of the GNC 420 unit.
To remove the NavData card:
1b. Gently press on the tab—using a slight upward motion—at the front center of the NavData card.
This will partially deploy the swing arm handle.
2b. Rotate the swing arm handle upward (and outward) until it locks into place, perpendicular to the
face of the GNC 420 unit.
3b. Grasp the top and bottom surfaces of the swing arm handle, between your thumb and fore-
finger, and pull directly away from the face of the GNC 420 unit to unseat the connector and
remove the NavData card.
E .
NAVDATA
CARD USE
b
b
b
APPENDIX A
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