Instruction Manual

The map display has 14 available ranges from 0.5 to 300 (nautical miles, statute miles
or kilometers) representing the vertical height of the map. The map scale is con-
trolled by the inner knob ( K ), with the current scale displayed in the lower right
corner of the page.
To select a map scale:
1. Rotate the
K knob clockwise to increase the map scale and show a larger area.
2. Rotate the
K knob counterclockwise to decrease the map scale and show a smaller area.
Another page available under the GNC 300XL’s N key is the navigation
communications (NAVCOM) page. It provides you with a complete list of airport
frequencies at your departure and arrival airports, allowing convenient selection of
frequencies you’ll need along your flight path. If you do not have an active departure
airport, the navigation communications page will display the frequencies for the
airport nearest your departure position.
To view the NAVCOM page from the map page, rotate O one stop to the right.
The NAVCOM page lists your departure and arrival airports on the left side of the
page, with all the database frequencies listed in a column down the right side of the
page. To scroll through the list of frequencies, simply rotate the inner knob ( K ) in
the direction of the arrow prompts at the bottom left of the page.
To place a frequency from the list in the standby field:
1. Press the
C key twice to activate the cursor in the GPS window.
2. Use the
O knob to select the desired frequency. Press E to place the frequency in
the standby field. The cursor will automatically advance to the next frequency on the list.
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The NAVCOM page lists the frequencies for your
departure and arrival airports. To place a fre-
quency from this list on standby, highlight the
desired frequency and press E.
To change the map scale rotate the K knob clock-
wise to increase the scale or counterclockwise to
decrease the scale.
TAKEOFF TOUR
Map Scales
NAVCOM Page
300xl manual 1/25/99 2:35 PM Page 8