11/3/22
Pilot/Controller Glossary
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
−
(See SEGMENTS OF A SID/STAR)
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 90-66, Non
−
Towered Airport Flight
Operations.)
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
.
C OM PLY WITH RE S TR IC TIONS
−
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.”
COMPUTER NAVIGATION FIX (CNF)
−
A
Computer Navigation Fix is a point defined by a
latitude/longitude coordinate and is required to
support Performance
−
Based Navigation (PBN)
operations. A five
−
letter identifier denoting a CNF
can be found next to an “x” on en route charts and on
some approach charts. Eventually, all CNFs will be
labeled and begin with the letters “CF” followed by
three consonants (e.g., ‘CFWBG’). CNFs are not
recognized by ATC, are not contained in ATC fix or
automation databases, and are not used for ATC
purposes. Pilots should not use CNFs for point
−
to
−
point navigation (e.g., proceed direct), filing a flight
plan, or in aircraft/ATC communications. Use of
CNFs has not been adopted or recognized by the
International Civil Aviation Organization (ICAO).
(REFER to AIM 1
−
1
−
17b5(i)(2), Global
Positioning System (GPS).
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.
PCG C
−
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