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Pilot/Controller Glossary

3/29/18

PCG C−5

COMBINED CENTER-RAPCON− An air traffic

facility which combines the functions of an ARTCC

and a radar approach control facility.

(See AIR ROUTE TRAFFIC CONTROL

CENTER.)

(See RADAR APPROACH CONTROL

FACILITY.)

COMMON POINT− A significant point over which

two or more aircraft will report passing or have

reported passing before proceeding on the same or

diverging tracks. To establish/maintain longitudinal

separation, a controller may determine a common

point not originally in the aircraft’s flight plan and

then clear the aircraft to fly over the point.

(See SIGNIFICANT POINT.)

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

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.)

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.”
CONDITIONS NOT MONITORED− When an

airport operator cannot monitor the condition of the

movement area or airfield surface area, this

information is issued as a NOTAM. Usually

necessitated due to staffing, operating hours or other

mitigating factors associated with airport operations.
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

2/28/19

Pilot/Controller Glossary