Garmin GNC 250XL - Manual (Page 53)

The airport communication page displays the radio frequencies and usage for
the selected airport, as well as sector and altitude restrictions.
To view the communication page from any of the airport information pages:
1. Rotate O with the cursor removed to display the communication page.
2. Rotate K in the direction of the arrow prompt to view additional frequencies. You may
also view additional frequencies with the cursor on the page by rotating the
O
knob.
The following descriptions and abbreviations are used on the communication page:
Frequencies without restriction information:
• ats - Automatic terminal information service (ATIS)
• ptx - Pre-taxi
• clr - Clearance delivery
• gnd - Ground
• twr - Tower
• uni - Unicom
• mul - Multicom
• atf - Aerodrome traffic frequency
• ctf - Common traffic advisory frequency (CTAF)
• mf - Mandatory frequency
• oth - Other frequencies
Frequencies with restriction information:
• dep - Departure • apr - Approach
• arv - Arrival • class B
• cta - ICAO control area • tma - ICAO terminal control area
• class C • trsa - Terminal radar service area
‘Receive only’ frequencies will be followed by an ‘rx’ indicator, while ‘transmit
only’ frequencies will display a ‘tx’. If a frequency has sector and/or altitude restric-
tions, they will also be displayed. Sector restrictions define a range of radials from the
facility, while altitude restrictions may describe an area above, below or between
altitudes. Additional instructions, if available, will be displayed on the bottom line.
43
Frequency page with sector restrictions.
Airport communications page for KCLT. Note
the ‘rx’ (receive only) indication on the ATIS
frequencies.
SECTION
3
WPT KEY
Airport
Communications Page
250xl manual 2 7/17/98 1:27 PM Page 43