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tandem cockpits, or two sets of flight controls but
operated by one pilot is considered single‐piloted by
ATC when determining the appropriate air traffic
service to be applied.
(See SINGLE FREQUENCY APPROACH.)
SKYSPOTTER- A pilot who has received specialized
training in observing and reporting inflight
weather phenomena.
SLASH- A radar beacon reply displayed as an
elongated target.
SLDI-
(See SECTOR LIST DROP INTERVAL.)
SLOT TIME-
(See METER FIX TIME/SLOT TIME.)
SLOW TAXI- To taxi a float plane at low power or
low RPM.
SN-
(See SYSTEM STRATEGIC NAVIGATION.)
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 URET 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 USER REQUEST EVALUATION TOOL.)
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.
SPECIAL INSTRUMENT APPROACH PROCEDURE-
(See INSTRUMENT APPROACH PROCEDURE.)
2/14/08 Pilot/Controller Glossary
PCG S-5
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
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 Area are conducted in
accordance with Federal Aviation Regulations, and
pilots of participating aircraft as well as pilots
transiting the area are 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)- A MOA is
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.
(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.)
e. Restricted Area- 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. Restricted areas are
depicted on en route charts. Where joint use is
authorized, the name of the ATC controlling facility
is also shown.
(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
potential danger. A warning area may be located over
domestic or international waters or both.
SPECIAL VFR CONDITIONS- Meteorological
conditions that are less than those required for basic
VFR flight in Class B, C, D, or E surface areas and
in which some aircraft are permitted flight under
visual flight rules.
(See SPECIAL VFR OPERATIONS.)
(Refer to 14 CFR Part 91.)
SPECIAL VFR FLIGHT [ICAO]- A VFR flight
cleared by air traffic control to operate within Class
B, C, D, and E surface areas in metrological
conditions below VMC.
SPECIAL VFR OPERATIONS- Aircraft operating
　
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