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Operation, subparagraph 37.7.6 for Mode C Transponder
Requirements for operating above Class C airspace.
c) Arrival or Through Flight Entry Requirements.
Two-way radio communication must be
established with the ATC facility providing ATC
services prior to entry and thereafter maintain those
communications while in Class C airspace. Pilots of
arriving aircraft should contact the Class C airspace
ATC facility on the publicized frequency and give
their position, altitude, radar beacon code, destination,
and request Class C service. Radio contact
should be initiated far enough from the Class C
airspace boundary to preclude entering Class C
airspace before two-way radio communications are
established.
NOTE-
1. If the controller responds to a radio call with, “(aircraft
callsign) standby,” radio communications have been
established and the pilot can enter the ClassC airspace.
2. If workload or traffic conditions prevent immediate
provision of Class C services, the controller will inform the
pilot to remain outside the Class C airspace until
conditions permit the services to be provided.
3. It is important to understand that if the controller
responds to the initial radio call without using the aircraft
identification, radio communications have not been
established and the pilot may not enter the ClassC
airspace.
EXAMPLE-
1. [Aircraft callsign] “remain outside the ClassCharlie
airspace and standby.”
2. “Aircraft calling Dulles approach control, standby.”
d) Departures from:
1) A primary or satellite airport with an
operating control tower. Two-way radio communications
must be established and maintained with the
control tower, and thereafter as instructed by ATC
while operating in Class C airspace.
2) A satellite airport without an operating
control tower. Two-way radio communications must
be established as soon as practicable after departing
with the ATC facility having jurisdiction over the
Class C airspace.
e) Aircraft Speed. Unless otherwise authorized
or required by ATC, no person may operate an aircraft
at or below 2,500 feet above the surface within
4nautical miles of the primary airport of a Class C
airspace area at an indicated airspeed of more than
200 knots (230 mph).
2.4.5 Air Traffic Services. When two-way radio
communications and radar contact are established, all
participating VFR aircraft are:
2.4.5.1 Sequenced to the primary airport.
2.4.5.2 Provided Class C services within the ClassC
airspace and the Outer Area.
2.4.5.3 Provided basic radar services beyond the
outer area on a workload permitting basis. This can be
terminated by the controller if workload dictates.
2.4.6 Aircraft Separation. Separation is provided
within the Class C airspace and the Outer Area after
two-way radio communications and radar contact are
established. VFR aircraft are separated from IFR
aircraft within the Class C airspace by any of the
following:
2.4.6.1 Visual separation.
2.4.6.2 500 feet vertical; except when operating
beneath a heavy jet.
2.4.6.3 Target resolution.
NOTE-
1. Separation and sequencing of VFR aircraft will be
suspended in the event of a radar outage as this service is
dependent on radar. The pilot will be advised that the
service is not available and issued wind, runway
information, and the time or place to contact the tower.
2. Separation of VFR aircraft will be suspended during
CENRAP operations. Traffic advisories and sequencing to
the primary airport will be provided on workload
permitting basis. The pilot will be advised when CENRAP
is in use.
3. Pilot participation is voluntary within the outer area
and can be discontinued within the outer area at the pilots
request. Class C services will be provided in the outer area
unless the pilot requests termination of the service.
ENR 1.4-8 AIP
15 MAR 07 United States of America
Nineteenth Edition Federal Aviation Administration
4. Some facilities provide Class C services only during
published hours. At other times, terminal IFR radar service
will be provided. It is important to note that the
communications requirements for entry into the airspace
and transponder Mode C requirements are in effect at all
times.
2.4.7 Secondary Airports
2.4.7.1 In some locations, Class C airspace may
overlie the Class D surface area of a secondary
airport. In order to allow that control tower to provide
service to aircraft, portions of the overlapping
ClassC airspace may be procedurally excluded when
　
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