Pilot/Controller Glossary

SELF-BRIEFING- A self-briefing is a review, using automated tools, of all meteorological and aeronautical
information that may influence the pilot in planning, altering, or canceling a proposed route of flight.
SENSE AND AVOID (SAA) - The capability of an unmanned aircraft to detect (sense) and avoid collisions
with other aircraft and all obstacles, whether airborne or on the ground while operating in the NAS.
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 longitudinal, 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 GRAPHICAL AIRMEN"S METEOROLOGICAL INFORMATION.)
(See SIGMET.)

SFA-
(See SINGLE FREQUENCY APPROACH.)

SFO-
(See SIMULATED FLAMEOUT.)

SGI
(See SPECIAL GOVERNMENT INTEREST.)

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.)