BENDIXKing AeroNav 910 Pilot's Manual page 155

NOTE
Heading vs. Track Depictions
In configurations in which aircraft heading information is
unavailable, the map display will orient the aircraft
ownship symbol and other map data to the aircraft
ground track and continue to display intruder aircraft
oriented to heading.
TIPS AND TECHNIQUES
Heading/Track Digital Display Can Be Removed
A map setup choice provides a means to remove the
heading/track digital readout box from the top of the
map. This is intended to provide a method to increase
usable map space, especially on dual AeroNav
installations where cleaner maps are desired.
NOTE
Map Orientation Without GPS
The map orientation will auto-switch from track-up
orientation to north-up orientation when GPS is lost.
Pilots who leave the map orientation in track-up during
shutdown may notice the map will start up in north-up
until a GPS position fix is available, at which time the
map will auto-switch to track-up.
NOTE
Terrain Resolution
The map uses 9 arc-sec terrain data globally. There are
however, some locations where the terrain database fills
in missing terrain cell data and the map terrain will
visually appear to be a lower resolution background in
those locales.
89000039-010
Rev 1 May 2019
AeroNav 900/880 Series Pilot's Guide
Map Subsystem 4-5