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| ![]() INSTRUMENT FLIGHT RULES WORKBOOK
CHAPTER EIGHT
The continuous broadcast of recorded noncontrol information in selected terminal areas. Its
purpose is to improve controller effectiveness and to relieve frequency congestion by automating
the repetitive transmission of essential but routine information, e.g., "Los Angeles Information
Alpha. One three zero zero Coordinated Universal Time weather, measured ceiling 2000
overcast, visibility three, haze, smoke, temperature seven one, dewpoint five seven, wind two
five zero at five, altimeter two niner niner six. ILS Runway two five left approach in use,
runway two five right closed, advise you have Alpha."
ATIS 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 5000 feet and the visibility is more than five miles. ATIS is
continuously broadcast on the voice feature of a TVOR/VOR/ VORTAC located on or near the
airport or on a discrete VHF/UHF frequency. The departure runway will 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. The aircrew of aircraft arriving at or departing from the
terminal area can receive the continuous ATIS broadcast at times when cockpit duties permit,
and may listen to as many repeats as desired. ATIS broadcast shall be updated upon the receipt
of any official hourly and special weather information. 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.
UNICOM
A non-government communications facility which may provide airport advisory information at
certain airports. Locations and frequencies of UNICOMs are shown on aeronautical charts and
publications.
804. ESTABLISHING COMMUNICATIONS
Initial Contact
The term "initial contact" means the first radio call you make to a facility or the first call to a
different controller/FSS specialist within a facility. When no previous communications exist,
communications must be established prior to message transmission (except for very short
messages such as checking-in after a hand-off). These are called "courtesy calls" when a
detailed or lengthy message is to follow.
Use the following format:
1.
Addressee
2.
Aircraft identification
3.
type of message to follow or your request
INTRODUCTION TO GROUND, AIRBORNE, LOST COMMUNICATION, AND
EMERGENCY VOICE PROCEDURES 8-9
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