Home' RTCA Documents for Review : C2 Link Systems MASPS_Draft Contents Appendix C
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Table C-15: Summary of ATC Requirements
FAA ATC Requirements Concerning Separation and Traffic Advisories
ATC SERVICE -The primary purpose of the ATC system is to prevent a collision
involving aircraft operating in the system.
DUTY PRIORITY - Give first priority to separating aircraft and issuing safety alerts
as required in this order. Good judgment must be used in prioritizing all other
provisions of this order
SAFETY ALERT - Issue a safety alert to an aircraft if you are aware the aircraft is in
a position/altitude that, in your judgment, places it in unsafe proximity to terrain,
obstructions, or other aircraft.
Section 2-1 -21
TRAFFIC ADVISORIES - Unless an aircraft is operating within Class A airspace or
omission is requested by the pilot, issue traffic advisories to all aircraft (IFR or VFR)
on your frequency when, in your judgment, their proximity may diminish to less than
the applicable separation minima. Where no separation minima applies, such as for
VFR aircraft outside of Class B/Class C airspace, or a Terminal Radar Service Area
(TRSA), issue traffic advisories to those aircraft on your frequency when in your
judgment their proximity warrants it.
Section 2-1 -22
UNMANNED AIRCRAFT SYSTEM (UAS) ACTIVITY INFORMATION -
Issue UAS advisory information for known UAS activity, when in your judgment
their proximity warrants it. If known, include position, distance, course, type of
unmanned aircraft (UA), and altitude.
Section 2-1 -27
PILOT DEVIATION NOTIFICATION - When it appears that the actions of a pilot
constitute a pilot deviation, notify the pilot, workload permitting.
Section 3-1 -1
PROVIDE ATC SERVICE - Provide airport traffic control service based only upon
observed or known traffic and airport conditions.
Note: When operating in accordance with CFRs, it is the responsibility of the pilot to
avoid collision with other aircraft. However, due to the limited space around
terminal locations, traffic information can aid pilots in avoiding collision between
aircraft operating within Class B, Class C, or Class D surface areas and the
terminal radar service areas, and transiting aircraft operating in proximity to
Section 3-1 -10
OBSERVED ABNORMALITIES - When requested by a pilot or when you deem it
necessary, inform an aircraft of any observed abnormal aircraft condition.
Section 3-1 -13
ESTABLISHING TWO−WAY COMMUNICATIONS - Pilots are required to
establish two-way radio communications before entering the Class D airspace. If the
controller responds to a radio call with, “(a/c call sign) standby,” radio
communications have been established and the pilot can enter the Class D airspace.
If workload or traffic conditions prevent immediate provision of Class D services,
inform the pilot to remain outside the Class D airspace until conditions permit the
services to be provided.
Section 5-2 -8
RADIO FAILURE - When you observe a Code 7600 display, apply the procedures
in Paragraph 10−4−4, Communications Failure.
Note: Should a transponder-equipped aircraft experience a loss of two-way radio
communications capability, the pilot can be expected to adjust his/her transponder to
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