T-45C TS INav-01
Review of FLIP and FAA Publications
Automatic Terminal Information Service (ATIS): The continuous broadcast of routine, but essential, non-
control information, such as weather, altimeter,
runway in use, etc. Absence of a ceiling and
visibility indicates that weather of 5,000 ft ceiling
and 5-mile visibility or better exists. The primary
purpose of ATIS is to reduce frequency
congestion on Ground Control and Approach
NOTE: The pilot statement Have the Numbers
does not indicate receipt of ATIS. Inform
Ground Control for taxi or Approach Control on
arrival you have Information Alpha, Bravo, etc.
from the ATIS broadcast.
Tie-In Flight Service Station: A Tie-In Flight
Service Station is tied-in by direct telephone line
(DL) to the Base Operations Dispatcher. It
provides services to the airport such as relaying flight plans to ARTCC, relaying clearances back to the
airport, providing NOTAM services, etc. It may or may not be located at the airport. All Flight Service
Stations monitor 255.4 and UHF/VHF guard frequencies; the call sign is RADIO.
EXAMPLE: San Angelo Radio
Approach Control: Approach Control facilities and their related function of Departure Control are
responsible for coordinating with Air Route Traffic Control Centers and Airport Traffic Control Towers for
the control of IFR traffic between the en route structure and the airport. Absence of a separate name
indicates the same name as the airport. If not under ATC control, contact Approach Control on the
designated frequency for practice approaches, Special VFR, etc.
In some high density areas, specific Approach Control frequencies will be footnoted for use according to
the geographical sector in which your aircraft is located, not according to heading.