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Pilot/Controller Glossary

3/29/18

PCG C−9

CRUISE− Used in an ATC clearance to authorize a

pilot to conduct flight at any altitude from the

minimum IFR altitude up to and including the

altitude specified in the clearance. The pilot may

level off at any intermediate altitude within this block

of airspace. Climb/descent within the block is to be

made at the discretion of the pilot. However, once the

pilot starts descent and verbally reports leaving an

altitude in the block, he/she may not return to that

altitude without additional ATC clearance. Further, it

is approval for the pilot to proceed to and make an

approach at destination airport and can be used in

conjunction with:

a. An airport clearance limit at locations with a

standard/special instrument approach procedure. The

CFRs require that if an instrument letdown to an

airport is necessary, the pilot shall make the letdown

in accordance with a standard/special instrument

approach procedure for that airport, or

b. An airport clearance limit at locations that are

within/below/outside controlled airspace and with-

out a standard/special instrument approach

procedure. Such a clearance is NOT AUTHORIZA-

TION for the pilot to descend under IFR conditions

below the applicable minimum IFR altitude nor does

it imply that ATC is exercising control over aircraft

in Class G airspace; however, it provides a means for

the aircraft to proceed to destination airport, descend,

and land in accordance with applicable CFRs

governing VFR flight operations. Also, this provides

search and rescue protection until such time as the

IFR flight plan is closed.

(See INSTRUMENT APPROACH

PROCEDURE.)

CRUISE CLIMB− A climb technique employed by

aircraft, usually at a constant power setting, resulting

in an increase of altitude as the aircraft weight

decreases.
CRUISING ALTITUDE− An altitude or flight level

maintained during en route level flight. This is a

constant altitude and should not be confused with a

cruise clearance.

(See ALTITUDE.)
(See ICAO term CRUISING LEVEL.)

CRUISING LEVEL−

(See CRUISING ALTITUDE.)

CRUISING LEVEL [ICAO]− A level maintained

during a significant portion of a flight.

CT MESSAGE− An EDCT time generated by the

ATCSCC to regulate traffic at arrival airports.

Normally, a CT message is automatically transferred

from the traffic management system computer to the

NAS en route computer and appears as an EDCT. In

the event of a communication failure between the

traffic management system computer and the NAS,

the CT message can be manually entered by the TMC

at the en route facility.

CTA−

(See CONTROLLED TIME OF ARRIVAL.)
(See ICAO term CONTROL AREA.)

CTAF−

(See COMMON TRAFFIC ADVISORY

FREQUENCY.)

CTAS−

(See 

CENTER TRACON AUTOMATION

SYSTEM.)

CTOP−

(See COLLABORATIVE TRAJECTORY

OPTIONS PROGRAM)

CTRD−

(See CERTIFIED TOWER RADAR DISPLAY.)

CURRENT FLIGHT PLAN [ICAO]− The flight

plan, including changes, if any, brought about by

subsequent clearances.

CURRENT PLAN− The ATC clearance the aircraft

has received and is expected to fly.

CVFP APPROACH−

(See CHARTED VISUAL FLIGHT PROCEDURE

APPROACH.)

CWA−

(See CENTER WEATHER ADVISORY and

WEATHER ADVISORY.)

9/13/18

Pilot/Controller Glossary