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If a frequency has sector or altitude restrictions, the frequency will be followed by
a ‘brg?’ indication.
To view restrictions on a frequency:
1. Press
C
twice to activate the cursor in the GPS window.
2. Rotate
O
to highlight the ‘brg?’ next to the frequency you wish to view.
3. Press
E
to begin viewing restrictions.
Once you begin viewing restrictions, you can view any additional frequencies for
the selected airport by rotating
K
. (Note: An arrow prompt displayed next to the air-
port identifier indicates additional frequencies are available.) You can also view the
other airport information pages by rotating
O
. Information contained on these pages
is covered in Section 3. To return to the NAVCOM page, press
N
.
Some frequencies in the NAVCOM page have tags which designate their usage:
‘tx’ – transmit only ‘rx’ – receive only
‘pt’ – part time frequency
To make any of the frequencies on the NAVCOM page the standby frequency:
1. Press
C
twice to activate the cursor in the GPS window.
2. Rotate
O
until the desired frequency is highlighted.
3. Press
E
to make the highlighted frequency the standby frequency. The cursor will auto-
matically advance to the next frequency on the list.
17
Frequency restrictions on 124.60, showing range
of applicable radials from 130º through 309º.
NAVCOM page with receive only (rx) frequencies
and frequencies with restrictions (brg).
SECTION
1
NAV KEY
NAVCOM Page
250xl manual 2 7/17/98 1:27 PM Page 17