faraim.org

Aeronautical Information Manual (AIM), page 631

5/26/16
12/10/15

COMMON PORTION-
(See COMMON ROUTE.)
COMMON ROUTE- That segment of a North
American Route between the inland navigation
facility and the coastal fix.

OR
COMMON ROUTE- Typically the portion of a
RNAV STAR between the en route transition end
point and the runway transition start point; however,
the common route may only consist of a single point
that joins the en route and runway transitions.
COMMON TRAFFIC ADVISORY FREQUENCY
(CTAF)- A frequency designed for the purpose of
carrying out airport advisory practices while
operating to or from an airport without an operating
control tower. The CTAF may be a UNICOM,
Multicom, FSS, or tower frequency and is identified
in appropriate aeronautical publications.
(See DESIGNATED COMMON TRAFFIC
ADVISORY FREQUENCY (CTAF) AREA.)
(Refer to AC 90-42, Traffic Advisory Practices at
Airports Without Operating Control Towers.)

COMPASS LOCATOR- A low power, low or
medium frequency (L/MF) radio beacon installed at
the site of the outer or middle marker of an instrument
landing system (ILS). It can be used for navigation at
distances of approximately 15 miles or as authorized
in the approach procedure.

a. Outer Compass Locator (LOM)- A compass

locator installed at the site of the outer marker of an
instrument landing system.
(See OUTER MARKER.)

b. Middle Compass Locator (LMM)- A compass

locator installed at the site of the middle marker of an

instrument landing system.

(See MIDDLE MARKER.)
(See ICAO term LOCATOR.)

COMPASS ROSE- A circle, graduated in degrees,
printed on some charts or marked on the ground at an
airport. It is used as a reference to either true or
magnetic direction.
COMPLY WITH RESTRICTIONS- An ATC

instruction that requires an aircraft being vectored
back onto an arrival or departure procedure to comply
with all altitude and/or speed restrictions depicted on
the procedure. This term may be used in lieu of
Pilot/Controller Glossary

repeating each remaining restriction that appears on
the procedure.
COMPOSITE FLIGHT PLAN- A flight plan which
specifies VFR operation for one portion of flight and
IFR for another portion. It is used primarily in
military operations.
(Refer to AIM.)
COMPOSITE ROUTE SYSTEM- An organized
oceanic route structure, incorporating reduced lateral
spacing between routes, in which composite
separation is authorized.
COMPOSITE SEPARATION- A method of separat-
ing aircraft in a composite route system where, by
management of route and altitude assignments, a
combination of half the lateral minimum specified for
the area concerned and half the vertical minimum is
applied.
COMPULSORY REPORTING POINTS- Reporting
points which must be reported to ATC. They are
designated on aeronautical charts by solid triangles or
filed in a flight plan as fixes selected to define direct
routes. These points are geographical locations
which are defined by navigation aids/fixes. Pilots
should discontinue position reporting over compul-
sory reporting points when informed by ATC that
their aircraft is in "radar contact."

CONFIDENCE MANEUVER- A confidence man-
euver consists of one or more turns, a climb or
descent, or other maneuver to determine if the pilot
in command (PIC) is able to receive and comply with

ATC instructions.

CONFLICT ALERT- A function of certain air traffic
control automated systems designed to alert radar
controllers to existing or pending situations between

tracked targets (known IFR or VFR aircraft) that

require his/her immediate attention/action.

(See MODE C INTRUDER ALERT.)

CONFLICT RESOLUTION- The resolution of
potential conflictions between aircraft that are radar
identified and in communication with ATC by
ensuring that radar targets do not touch. Pertinent
traffic advisories shall be issued when this procedure
is applied.
Note: This procedure shall not be provided utilizing
mosaic radar systems.

CONFORMANCE- The condition established when
an aircraft's actual position is within the conformance
region constructed around that aircraft at its position,

PCG C-5

Page 631 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   630 -- Page 631 -- 632