Pilot/Controller Glossary

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 maneuver 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,
according to the trajectory associated with the
aircraft"s Current Plan.
CONFORMANCE REGION- A volume, bounded
laterally, vertically, and longitudinally, within which
an aircraft must be at a given time in order to be in
conformance with the Current Plan Trajectory for that
aircraft. At a given time, the conformance region is
determined by the simultaneous application of the
lateral, vertical, and longitudinal conformance
bounds for the aircraft at the position defined by time
and aircraft"s trajectory.
CONSOLAN- A low frequency, long-distance
NAVAID used principally for transoceanic navigations.
CONTACT-
a. Establish communication with (followed by the
name of the facility and, if appropriate, the frequency
to be used).

b. A flight condition wherein the pilot ascertains
the attitude of his/her aircraft and navigates by visual
reference to the surface.
(See CONTACT APPROACH.)
(See RADAR CONTACT.)

CONTACT APPROACH- An approach wherein an
aircraft on an IFR flight plan, having an air traffic
control authorization, operating clear of clouds with
at least 1 mile flight visibility and a reasonable
expectation of continuing to the destination airport in
those conditions, may deviate from the instrument
approach procedure and proceed to the destination
airport by visual reference to the surface. This
approach will only be authorized when requested by
the pilot and the reported ground visibility at the
destination airport is at least 1 statute mile.
(Refer to AIM.)

CONTAMINATED RUNWAY- A runway is
considered contaminated whenever standing water,
ice, snow, slush, frost in any form, heavy rubber, or
other substances are present. A runway is contaminated with respect to rubber deposits or other
friction-degrading substances when the average
friction value for any 500-foot segment of the runway
within the ALD fails below the recommended
minimum friction level and the average friction value
in the adjacent 500-foot segments falls below the
maintenance planning friction level.
CONTERMINOUS U.S.- The 48 adjoining States
and the District of Columbia.
CONTINENTAL UNITED STATES- The 49 States
located on the continent of North Americnd the
District of Columbia.
CONTINUE- When used as a control instruction
should be followed by another word or words
clarifying what is expected of the pilot. Example:
"continue taxi," "continue descent," "continue
inbound," etc.
CONTROL AREA [ICAO]- A controlled airspace
extending upwards from a specified limit above the
earth.
CONTROL SECTOR- An airspace area of defined
horizontal and vertical dimensions for which a
controller or group of controllers has air traffic
control responsibility, normally within an air route
traffic control center or an approach control facility.
Sectors are established based on predominant traffic
flows, altitude strata, and controller workload. Pilot