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Pilot/Controller Glossary

3/29/18

PCG G−3

precision radar approach is desired or request an

“ASR” or “surveillance” approach when a nonpreci-

sion radar approach is desired.

(See RADAR APPROACH.)

GROUND DELAY PROGRAM (GDP)− A traffic

management process administered by the ATCSCC,

when aircraft are held on the ground. The purpose of

the program is to support the TM mission and limit

airborne holding. It is a flexible program and may be

implemented in various forms depending upon the

needs of the AT system. Ground delay programs

provide for equitable assignment of delays to all

system users.
GROUND SPEED− The speed of an aircraft relative

to the surface of the earth.

GROUND STOP (GS)− The GS is a process that

requires aircraft that meet a specific criteria to remain

on the ground.  The criteria may be airport specific,

airspace specific, or equipment specific; for example,

all departures to San Francisco, or all departures

entering Yorktown sector, or all Category I and II

aircraft going to Charlotte.  GSs normally occur with

little or no warning.

GROUND VISIBILITY−

(See VISIBILITY.)

GS−

(See GROUND STOP.)