Fr: zone de contr.le
convective SIGMET U.S.: A weather advisory concerning convective weather significant to the safety of all aircraft. Convective SIGMETs are issued for tornadoes, lines of thunderstorms, embedded thunderstorms of any intensity level, areas of thunderstorms greater than or equal to VIP level 4 with an area coverage of 4/10 (40%) or more, and hail 3/4 in. or greater.
converging runway display aid
A radar software that permits the sequencing and spacing of aircraft by terminal controllers.
. abbreviation: CRDA
Fr: aide d’affichage de pistes convergentes
Co-Ordinated Universal Time The time system used in aviation operations and given to the nearest minute, except when the pilot requests a time check. Time checks are given to the nearest 15 s. The day begins at 0000 and ends at 2359.
.
written abbreviation: Z or UTC
.
spoken expression: zulu or universal
Note: The expression “zulu” is pronounced “ZOO loo.”
Fr: temps universel coordonné
co-ordinates The intersection of lines of reference, usually expressed in degrees, minutes and seconds of latitude and longitude, used to determine position or location. Fr: coordonnées
co-ordinating controller
A duty controller assigned to co-ordinate flight data between two or more control positions.
Fr: contr.leur de coordination
COP Abbreviation for: change-over point Fr: COP
co-pilot
A licensed pilot assigned to duty as a pilot in an aircraft during flight time, other than as
(a)
a pilot-in-command; or
(b)
a pilot receiving flying instruction.
. also called: first officer (F/O)
Fr: copilote
“Correction” An expression used in radiocommunication meaning “An error has been made in this transmission (or in the message indicated). The correct version is . . .” Fr: . Correction .
CPDLC Abbreviation for: controller-pilot data link communications Fr: CPDLC
crash locator beacon NATO: Expression for: emergency locator transmitter (ELT)
CRDA Abbreviation for: converging runway display aid Fr: CRDA
crew member
A person assigned to duty on an aircraft during flight time.
Fr: membre d’équipage
CRFI Abbreviation for: Canadian Runway Friction Index Fr: CRFI
CRFI reading Other expression for: Canadian Runway Friction Index
critical engine The engine the failure of which would most adversely affect the performance or handling qualities of an aircraft. Fr: moteur le plus défavorable
crossing tracks An expression used in the application of separation indicating tracks that converge or diverge at an angle of 45° to 135° inclusive. Fr: routes sécantes
crosswind
When referring to wind conditions, a wind not parallel to the runway or the path of an aircraft.
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