Instruction Manual

The next page available from the GNC 300XL’s N key is the map page. The
map page displays your present position, using an airplane symbol (in track up mode)
or a position diamond (in other orientation modes), along with nearby airports,
VORs, NDBs, intersections, user waypoints and airspace boundaries. Note: If the
GNC 300XL is unable to determine a GPS position the present position symbol will
not appear on the map page.
The top left corner of the page indicates the active and standby communications
frequencies — unlike other GNC 300XL screens which display both frequencies
across the top line — with the active frequency on top.
The map display occupies the right side of the display and shows your position
relative to nearby airports, navaids, user waypoints and airspaces. Different symbols
are used to distinguish between waypoint types. The identifiers for any on-screen
waypoints can also be displayed. Special-use and controlled airspace boundaries
appear on the map, showing the individual sectors in the case of Class B or Class C
airspace. The map display can be configured to display airports, navaids, user way-
points, airspaces only at certain scales or these items may be disabled entirely (see
page 100). This allows you to de-clutter the map display at larger scale settings.
The map display can be set to 14 different scale settings from 0.5 to 300 (nautical
miles, statute miles or kilometers) during en route operation; while in terminal or
approach mode 12 different scale settings are available (with the two highest en route
scales disabled). The scale represents the top-to-bottom distance covered by the map
display.
15
The map page, showing airports, airspaces, VORs
and NDBs on the map display. The data fields
located at the corners of the map display may be
removed by pressing \.
The map page, showing only airports and air-
spaces on the map display.
SECTION
1
NAV KEY
Map Page
Data
Fields
Present
Position
{
Map Display
Map Scale
300xl manual 1/25/99 2:35 PM Page 15