Pilot/Controller Glossary

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reentry operations occur. For pilot awareness, a
rocket-shaped symbol is used to depict space launch
and reentry areas on sectional aeronautical charts.
SPEAK SLOWER- Used in verbal communications
as a request to reduce speech rate.

SPECIAL ACTIVITY AIRSPACE (SAA)- Any
airspace with defined dimensions within the National
Airspace System wherein limitations may be
imposed upon aircraft operations. This airspace may
be restricted areas, prohibited areas, military
operations areas, air ATC assigned airspace, and any
other designated airspace areas. The dimensions of
this airspace are programmed into EDST and can be
designated as either active or inactive by screen entry.
Aircraft trajectories are constantly tested against the
dimensions of active areas and alerts issued to the
applicable sectors when violations are predicted.
(See EN ROUTE DECISION SUPPORT TOOL.)

SPECIAL AIR TRAFFIC RULES (SATR)- Rules
that govern procedures for conducting flights in
certain areas listed in 14 CFR Part 93. The term
"SATR" is used in the United States to describe the
rules for operations in specific areas designated in the
Code of Federal Regulations.
(Refer to 14 CFR Part 93.)

SPECIAL EMERGENCY- A condition of air piracy
or other hostile act by a person(s) aboard an aircraft
which threatens the safety of the aircraft or its
passengers.

of aerial activity, neither of which is hazardous to
aircraft. Alert Areas are depicted on aeronautical
charts for the information of nonparticipating pilots.
All activities within an Alert Arere conducted in
accordance with Federal Aviation Regulations, and
pilots of participating aircraft as well as pilots
transiting the arere equally responsible for
collision avoidance.
b. Controlled Firing Area- Airspace wherein
activities are conducted under conditions so
controlled as to eliminate hazards to nonparticipating
aircraft and to ensure the safety of persons and
property on the ground.
c. Military Operations Area (MOA)- Permanent
and temporary MOAs are airspace established
outside of Class A airspace area to separate or
segregate certain nonhazardous military activities
from IFR traffic and to identify for VFR traffic where
these activities are conducted. Permanent MOAs are
depicted on Sectional Aeronautical, VFR Terminal
Area, and applicable En Route Low Altitude Charts.
Note: Temporary MOAs are not charted.
(Refer to AIM.)

d. Prohibited Area- Airspace designated under
14 CFR Part 73 within which no person may operate
an aircraft without the permission of the using
agency.
(Refer to AIM.)
(Refer to En Route Charts.)

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SPECIAL FLIGHT RULES AREA (SFRA)- An
area in the NAS, described in 14 CFR Part 93,
wherein the flight of aircraft is subject to special
traffic rules, unless otherwise authorized by air traffic
control. Not all areas listed in 14 CFR Part 93 are
designated SFRA, but special air traffic rules apply to
all areas described in 14 CFR Part 93.
SPECIAL INSTRUMENT APPROACH PROCE
DURE-
(See INSTRUMENT APPROACH PROCEDURE.)

SPECIAL USE AIRSPACE- Airspace of defined
dimensions identified by an area on the surface of the
earth wherein activities must be confined because of
their nature and/or wherein limitations may be
imposed upon aircraft operations that are not a part of
those activities. Types of special use airspace are:
a. Alert Area- Airspace which may contain a high
volume of pilot training activities or an unusual type

e. Restricted Area- Permanent and temporary
restricted areas are airspace designated under 14 CFR
Part 73, within which the flight of aircraft, while not
wholly prohibited, is subject to restriction. Most
restricted areas are designated joint use and IFR/VFR
operations in the area may be authorized by the
controlling ATC facility when it is not being utilized
by the using agency. Permanent restricted areas are
depicted on Sectional Aeronautical, VFR Terminal
Area, and applicable En Route charts. Where joint
use is authorized, the name of the ATC controlling
facility is also shown.
Note: Temporary restricted areas are not charted.
(Refer to 14 CFR Part 73.)
(Refer to AIM.)

f. Warning Area- A warning area is airspace of
defined dimensions extending from 3 nautical miles
outward from the coast of the United States, that
contains activity that may be hazardous to
nonparticipating aircraft. The purpose of such
warning area is to warn nonparticipating pilots of the