Pilot/Controller Glossary

ACTUAL NAVIGATION PERFORMANCE (ANP)-
(See REQUIRED NAVIGATION PERFORMANCE.)

ADAPTED ROUTES- Departure and/or arrival routes that are adapted in ARTCC ERAM computers to
accomplish inter/intrafacility controller coordination and to ensure that flight data is posted at the proper control
positions. Adapted routes are automatically applied to flight plans where appropriate. When the workload or
traffic situation permits, controllers may provide radar vectors or assign requested routes to minimize circuitous
routing. Adapted routes are usually confined to one ARTCC"s arend are referred to by the following names
or abbreviations:
a. Adapted Arrival Route (AAR). A specific arrival route from an appropriate en route point to an airport or
terminal area. It may be included in a Standard Terminal Arrival (STAR) or a Preferred IFR Route.
b. Adapted Departure Route (ADR). A specific departure route from an airport or terminal area to an en route
point where there is no further need for flow control. It may be included in an Instrument Departure Procedure
(DP) or a Preferred IFR Route.
c. Adapted Departure and Arrival Route (ADAR). A route between two terminals which are within or
immediately adjacent to one ARTCC"s area. ADARs are similar to Preferred IFR Routes and may share
components, but they are not synonymous.
(See PREFFERED IFR ROUTES.)

ADAR-
(See ADAPTED ROUTES.)

ADDITIONAL SERVICES- Advisory information provided by ATC which includes but is not limited to the
following:
a. Traffic advisories.
b. Vectors, when requested by the pilot, to assist aircraft receiving traffic advisories to avoid observed traffic.
c. Altitude deviation information of 300 feet or more from an assigned altitude as observed on a verified
(reading correctly) automatic altitude readout (Mode C).
d. Advisories that traffic is no longer a factor.
e. Weather and chaff information.
f. Weather assistance.
g. Bird activity information.
h. Holding pattern surveillance. Additional services are provided to the extent possible contingent only upon
the controller"s capability to fit them into the performance of higher priority duties and on the basis of limitations
of the radar, volume of traffic, frequency congestion, and controller workload. The controller has complete
discretion for determining if he/she is able to provide or continue to provide a service in a particular case. The
controller"s reason not to provide or continue to provide a service in a particular case is not subject to question
by the pilot and need not be made known to him/her.
(See TRAFFIC ADVISORIES.)
(Refer to AIM.)

ADF-
(See AUTOMATIC DIRECTION FINDER.)

ADIZ-
(See AIR DEFENSE IDENTIFICATION ZONE.)

ADLY-
(See ARRIVAL DELAY.)

ADMINISTRATOR- The Federal Aviation Administrator or any person to whom he/she has delegated his/her
authority in the matter concerned.
ADR-
(See ADAPTED ROUTES.)
(See AIRPORT DEPARTURE RATE.)