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Pilot/Controller Glossary

3/29/18

PCG S−3

point where the aircraft is established on the

intermediate course or final approach course.

(See ICAO term INITIAL APPROACH

SEGMENT.)

b. Intermediate Approach− The segment between

the intermediate fix or point and the final approach

fix.

(See ICAO term INTERMEDIATE APPROACH

SEGMENT.)

c. Final Approach− The segment between the final

approach fix or point and the runway, airport, or

missed approach point.

(See ICAO term FINAL APPROACH SEGMENT.)

d. Missed Approach− The segment between the

missed approach point or the point of arrival at

decision height and the missed approach fix at the

prescribed altitude.

(Refer to 14 CFR Part 97.)
(See ICAO term MISSED APPROACH

PROCEDURE.)

SEPARATION− In air traffic control, the spacing of

aircraft to achieve their safe and orderly movement in

flight and while landing and taking off.

(See SEPARATION MINIMA.)
(See ICAO term SEPARATION.)

SEPARATION [ICAO]− Spacing between aircraft,

levels or tracks.

SEPARATION MINIMA− The minimum longitudi-

nal, lateral, or vertical distances by which aircraft are

spaced through the application of air traffic control

procedures.

(See SEPARATION.)

SERVICE− A generic term that designates functions

or assistance available from or rendered by air traffic

control. For example, Class C service would denote

the ATC services provided within a Class C airspace

area.

SEVERE WEATHER AVOIDANCE PLAN

(SWAP)− An approved plan to minimize the affect of

severe weather on traffic flows in impacted terminal

and/or ARTCC areas. A SWAP is normally

implemented to provide the least disruption to the

ATC system when flight through portions of airspace

is difficult or impossible due to severe weather.

SEVERE WEATHER FORECAST ALERTS−

Preliminary messages issued in order to alert users

that a Severe Weather Watch Bulletin (WW) is being

issued. These messages define areas of possible

severe thunderstorms or tornado activity. The

messages are unscheduled and issued as required by

the Storm Prediction Center (SPC) at Norman,

Oklahoma.

(See AIRMET.)
(See CONVECTIVE SIGMET.)
(See CWA.)
(See SIGMET.)

SFA−

(See SINGLE FREQUENCY APPROACH.)

SFO−

(See SIMULATED FLAMEOUT.)

SHF−

(See SUPER HIGH FREQUENCY.)

SHORT RANGE CLEARANCE− A clearance

issued to a departing IFR flight which authorizes IFR

flight to a specific fix short of the destination while

air traffic control facilities are coordinating and

obtaining the complete clearance.

SHORT TAKEOFF AND LANDING AIRCRAFT

(STOL)− An aircraft which, at some weight within its

approved operating weight, is capable of operating

from a runway in compliance with the applicable

STOL characteristics, airworthiness, operations,

noise, and pollution standards.

(See VERTICAL TAKEOFF AND LANDING

AIRCRAFT.)

SIAP−

(See STANDARD INSTRUMENT APPROACH

PROCEDURE.)

SID−

(See STANDARD INSTRUMENT DEPARTURE.)

SIDESTEP MANEUVER− A visual maneuver

accomplished by a pilot at the completion of an

instrument approach to permit a straight-in landing

on a parallel runway not more than 1,200 feet to either

side of the runway to which the instrument approach

was conducted.

(Refer to AIM.)

SIGMET−  A weather advisory issued concerning

weather significant to the safety of all aircraft.