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control purposes, only under the following circumstances:
9.5.1.1 Revision to proposed departure time.
9.5.1.2 Takeoff, arrival, or flight plan cancellation
time.
9.5.1.3 ATC clearance, provided arrangements are
made between the ATC facility and the UNICOM
licensee to handle such messages.
TBL GEN 3.3−2
UNICOM/MULTICOM Frequency Usage
Use Frequency
Airports without an
operating control tower.
122.700
122.725
122.800
122.975
123.000
123.050
123.075
(MULTICOM
FREQUENCY) Activities
of a temporary, seasonal,
emergency nature or
search and rescue, as well
as, airports with no tower,
FSS, or UNICOM.
122.900
(MULTICOM
FREQUENCY) Forestry
management and fire
suppression, fish and
game management and
protection, and
environmental monitoring
and protection.
122.925
Airports with a control
tower or FSS on airport.
122.950
TBL GEN 3.3−3
Other Frequency Usage Designated by FCC
Use Frequency
Air-to-air communication
(private fixed wing
aircraft).
122.750
Air-to-air communications
(general aviation
helicopters).
123.025
Aviation instruction,
Glider, Hot Air Balloon
(not to be used for
advisory service).
123.300
123.500
AIP
United States of America
GEN 3.3−13
15 MAR 07
Federal Aviation Administration Nineteenth Edition
9.6Automatic Terminal Information Service
(ATIS)
9.6.1ATIS is the continuous broadcast of recorded
noncontrol information in selected high activity
terminal areas. Its purpose is to improve controller
effectiveness and to relieve frequency congestion by
automating the repetitive transmission of essential
but routine information. The information is continuously
broadcast over a discrete VHF radio frequency
or the voice portion of a local NAVAID. ATIS
transmissions on a discrete VHF radio frequency are
engineered to be receivable to a maximum of 60 NM
from the ATIS site and a maximum altitude of
25,000feet AGL. At most locations, ATIS signals
may be received on the surface of the airport, but local
conditions may limit the maximum ATIS reception
distance and/or altitude. Pilots are urged to cooperate
in the ATIS program as it relieves frequency
congestion on approach control, ground control, and
local control frequencies. The Airport/Facility
Directory indicates airports for which ATIS is
provided.
9.6.2ATIS information includes the time of the latest
weather sequence, ceiling, visibility, obstructions to
visibility, temperature, dew point (if available), wind
direction (magnetic), and velocity, altimeter, other
pertinent remarks, instrument approach, and runway
in use. The ceiling/sky condition, visibility, and
obstructions to vision may be omitted from the ATIS
broadcast if the ceiling is above 5,000 feet and the
visibility is more than 5 miles. The departure runway
will only be given if different from the landing
runway except at locations having a separate ATIS for
departure. The broadcast may include the appropriate
frequency and instructions for VFR arrivals to make
initial contact with approach control. Pilots of aircraft
arriving or departing the terminal area can receive the
continuous ATIS broadcast at times when cockpit
duties are least pressing and listen to as many repeats
as desired. ATIS broadcast shall be updated upon the
receipt of any official hourly and special weather. A
new recording will also be made when there is a
change in other pertinent data such as runway change,
instrument approach in use, etc.
SAMPLE BROADCAST−
DULLES INTERNATIONAL INFORMATION SIERRA.
1300ZULU WEATHER. MEASURED CEILING THREE
THOUSAND OVERCAST. VISIBILITY THREE, SMOKE.
TEMPERATURE SIX EIGHT. WIND THREE FIVE ZERO
AT EIGHT. ALTIMETER TWO NINER NINER TWO. ILS
RUNWAY ONE RIGHT APPROACH IN USE. LANDING
RUNWAY ONE RIGHT AND LEFT. DEPARTURE
RUNWAY THREE ZERO. ARMEL VORTAC OUT OF
SERVICE. ADVISE YOU HAVE SIERRA.
9.6.3Pilots should listen to ATIS broadcasts
whenever ATIS is in operation.
9.6.4Pilots should notify controllers on initial
contact that they have received the ATIS broadcast by
repeating the alphabetical code word appended to the
broadcast.
EXAMPLE−
Information Sierra received."
9.6.5When the pilot acknowledges receipt of the
ATIS broadcast, controllers may omit those items
contained on the broadcast if they are current.
Rapidly changing conditions will be issued by ATC
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