S
SAA-
(See SPECIAL ACTIVITY
AIRSPACE.)
SAFETY ALERT- A safety
alert issued by ATC to aircraft under their control if ATC is aware the aircraft
is at an altitude which, in the controller's judgment, places the aircraft in
unsafe proximity to terrain, obstructions, or other aircraft. The controller may
discontinue the issuance of further alerts if the pilot advises he/she is taking
action to correct the situation or has the other aircraft in sight.
a. Terrain/Obstruction
Alert- A safety alert issued by ATC to aircraft under their control if ATC is
aware the aircraft is at an altitude which, in the controller's judgment, places
the aircraft in unsafe proximity to terrain/obstructions; e.g., "Low Altitude
Alert, check your altitude immediately."
b. Aircraft
Conflict Alert- A safety alert issued by ATC to aircraft under their control if
ATC is aware of an aircraft that is not under their control at an altitude
which, in the controller's judgment, places both aircraft in unsafe proximity to
each other. With the alert, ATC will offer the pilot an alternate course of
action when feasible; e.g., "Traffic Alert, advise you turn right heading zero
niner zero or climb to eight thousand immediately."
Note: The issuance of a
safety alert is contingent upon the capability of the controller to have an
awareness of an unsafe condition. The course of action provided will be
predicated on other traffic under ATC control. Once the alert is issued, it is
solely the pilot's prerogative to determine what course of action, if any,
he/she will take.
SAFETY LOGIC SYSTEM- A
software enhancement to ASDE-3, ASDE-X, and ASDE-3X, that predicts the path of
aircraft landing and/or departing, and/or vehicular movements on runways. Visual
and aural alarms are activated when the safety logic projects a potential
collision. The Airport Movement Area Safety System (AMASS) is a safety logic
system enhancement to the ASDE-3. The Safety Logic System for ASDE-X and ASDE-3X
is an integral part of the software program.
SAFETY LOGIC SYSTEM
ALERTS-
a. ALERT- An actual
situation involving two real safety logic tracks (aircraft/aircraft,
aircraft/vehicle, or aircraft/other tangible object) that safety logic has
predicted will result in an imminent collision, based upon the current set of
Safety Logic parameters.
b. FALSE ALERT-
1. Alerts generated
by one or more false surface-radar targets that the system has interpreted as
real tracks and placed into safety logic.
2. Alerts in which
the safety logic software did not perform correctly, based upon the design
specifications and the current set of Safety Logic parameters.
c. NUISANCE ALERT-
An alert in which one or more of the following is true:
1. The alert is
generated by a known situation that is not considered an unsafe operation, such
as LAHSO or other approved operations.
2. The alert is
generated by inaccurate secondary radar data received by the Safety Logic
System.
3. The alert is
generated by surface radar targets caused by moderate or greater precipitation.
4. One or more of
the aircraft involved in the alert is not intending to use a runway (i.e.,
helicopter, pipeline patrol, non-Mode C overflight, etc.).
d. VALID NON-ALERT-
A situation in which the safety logic software correctly determines that an
alert is not required, based upon the design specifications and the current set
of Safety Logic parameters.
e. I NVALID
NON-ALERT- A situation in which the safety logic software did not issue an alert
when an alert was required, based upon the design specifications.
SAIL BACK- A maneuver
during high wind conditions (usually with power off) where float plane movement
is controlled by water rudders/opening and closing cabin doors.
SAME DIRECTION AIRCRAFT-
Aircraft are operating in the same direction when:
a. They are
following the same track in the same direction; or
b. Their tracks are
parallel and the aircraft are flying in the same direction; or
c. Their tracks
intersect at an angle of less than 45 degrees.
SAR-
(See SEARCH AND RESCUE.)
SAY AGAIN-
Used to request a repeat of the last transmission. Usually specifies
transmission or portion thereof not understood or received; e.g., "Say again all
after ABRAM VOR."
SAY ALTITUDE-
Used by ATC to ascertain an aircraft's specific altitude/flight level. When
the aircraft is climbing or descending, the pilot should state the indicated
altitude rounded to the nearest 100 feet.
SAY HEADING-
Used by ATC to request an aircraft heading. The pilot should state the
actual heading of the aircraft.
SCHEDULED TIME OF ARRIVAL
(STA)- A STA is the desired time that an aircraft should cross a certain point
(landing or metering fix). It takes other traffic and airspace configuration
into account. A STA time shows the results of the TMA scheduler that has
calculated an arrival time according to parameters such as optimized spacing,
aircraft performance, and weather.
SDF-
(See SIMPLIFIED DIRECTIONAL
FACILITY.)
SEA LANE- A designated
portion of water outlined by visual surface markers for and intended to be used
by aircraft designed to operate on water.
SEARCH AND RESCUE- A
service which seeks missing aircraft and assists those found to be in need of
assistance. It is a cooperative effort using the facilities and services of
available Federal, state and local agencies. The U.S. Coast Guard is responsible
for coordination of search and rescue for the Maritime Region, and the U.S. Air
Force is responsible for search and rescue for the Inland Region. Information
pertinent to search and rescue should be passed through any air traffic facility
or be transmitted directly to the Rescue Coordination Center by telephone.
(See FLIGHT SERVICE STATION.)
(See RESCUE COORDINATION
CENTER.)
(Refer to AIM.)
SEARCH AND RESCUE
FACILITY- A facility responsible for maintaining and operating a search and
rescue (SAR) service to render aid to persons and property in distress. It is
any SAR unit, station, NET, or other operational activity which can be usefully
employed during an SAR Mission; e.g., a Civil Air Patrol Wing, or a Coast Guard
Station.
(See SEARCH AND RESCUE.)
SECONDARY RADAR TARGET- A
target derived from a transponder return presented on a radar display.
SECTIONAL AERONAUTICAL
CHARTS-
(See AERONAUTICAL CHART.)
SECTOR LIST DROP INTERVAL-
A parameter number of minutes after the meter fix time when arrival aircraft
will be deleted from the arrival sector list.
SECURITY SERVICES AIRSPACE - Areas
established through the regulatory process or by
NOTAM, issued by the Administrator under title 14,
CFR, sections 99.7, 91.141, and 91.139, which
specify that ATC security services are required; i.e.,
ADIZ or temporary flight rules areas.
SEE AND AVOID- When
weather conditions permit, pilots operating IFR or VFR are required to observe
and maneuver to avoid other aircraft. Right-of-way rules are contained in 14 CFR
Part 91.
SEGMENTED CIRCLE- A system
of visual indicators designed to provide traffic pattern information at airports
without operating control towers.
(Refer to AIM.)
SEGMENTS OF AN INSTRUMENT
APPROACH PROCEDURE- An instrument approach procedure may have as many as four
separate segments depending on how the approach procedure is structured.
a. Initial
Approach- The segment between the initial approach fix and the intermediate fix
or the 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 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- An approved plan to minimize the affect of severe weather on traffic flows
in impacted terminal and/or ARTCC areas. 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- An aircraft which, at some weight within its approved operating
weight, is capable of operating from a STOL 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. SIGMET advisories cover severe and extreme turbulence, severe icing,
and widespread dust or sandstorms that reduce visibility to less than 3 miles.
(See AIRMET.)
(See AWW.)
(See CONVECTIVE SIGMET.)
(See CWA.)
(See ICAO term SIGMET
INFORMATION.)
(Refer to AIM.)
SIGMET INFORMATION [ICAO]-
Information issued by a meteorological watch office concerning the occurrence or
expected occurrence of specified en-route weather phenomena which may affect the
safety of aircraft operations.
SIGNIFICANT
METEOROLOGICAL INFORMATION-
(See SIGMET.)
SIGNIFICANT POINT- A
point, whether a named intersection, a NAVAID, a fix derived from a NAVAID(s),
or geographical coordinate expressed in degrees of latitude and longitude, which
is established for the purpose of providing separation, as a reporting point, or
to delineate a route of flight.
SIMPLIFIED DIRECTIONAL FACILITY- A NAVAID used for nonprecision instrument
approaches. The final approach course is similar to that of an ILS localizer
except that the SDF course may be offset from the runway, generally not more
than 3 degrees, and the course may be wider than the localizer, resulting in a
lower degree of accuracy.
(Refer to AIM.)
SIMULATED FLAMEOUT- A
practice approach by a jet aircraft (normally military) at idle thrust to a
runway. The approach may start at a runway (high key) and may continue on a
relatively high and wide downwind leg with a continuous turn to final. It
terminates in landing or low approach. The purpose of this approach is to
simulate a flameout.
(See FLAMEOUT.)
SIMULTANEOUS ILS
APPROACHES- An approach system permitting simultaneous ILS/MLS approaches to
airports having parallel runways separated by at least 4,300 feet between
centerlines. Integral parts of a total system are ILS/MLS, radar,
communications, ATC procedures, and appropriate airborne equipment.
(See PARALLEL RUNWAYS.)
(Refer to AIM.)
SIMULTANEOUS MLS
APPROACHES-
(See SIMULTANEOUS ILS
APPROACHES.)
SINGLE DIRECTION ROUTES-
Preferred IFR Routes which are sometimes depicted on high altitude en route
charts and which are normally flown in one direction only.
(See PREFERRED IFR ROUTES.)
(Refer to AIRPORT/FACILITY
DIRECTORY.)
SINGLE FREQUENCY APPROACH-
A service provided under a letter of agreement to military single-piloted
turbojet aircraft which permits use of a single UHF frequency during approach
for landing. Pilots will not normally be required to change frequency from the
beginning of the approach to touchdown except that pilots conducting an en route
descent are required to change frequency when control is transferred from the
air route traffic control center to the terminal facility. The abbreviation "SFA"
in the DOD FLIP IFR Supplement under "Communications" indicates this service is
available at an aerodrome.
SINGLE-PILOTED AIRCRAFT- A
military turbojet aircraft possessing one set of flight controls, 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.)
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 in accordance with clearances within Class B, C, D, and E
surface areas in weather conditions less than the basic VFR weather minima. Such
operations must be requested by the pilot and approved by ATC.
(See SPECIAL VFR CONDITIONS.)
(See ICAO term SPECIAL VFR
FLIGHT.)
SPEED-
(See AIRSPEED.)
(See GROUND SPEED.)
SPEED ADJUSTMENT- An ATC
procedure used to request pilots to adjust aircraft speed to a specific value
for the purpose of providing desired spacing. Pilots are expected to maintain a
speed of plus or minus 10 knots or 0.02 Mach number of the specified speed.
Examples of speed adjustments are:
a. "Increase/reduce
speed to Mach point (number.)"
b. "Increase/reduce
speed to (speed in knots)" or "Increase/reduce speed (number of knots) knots."
SPEED BRAKES- Moveable
aerodynamic devices on aircraft that reduce airspeed during descent and landing.
SPEED SEGMENTS- Portions
of the arrival route between the transition point and the vertex along the
optimum flight path for which speeds and altitudes are specified. There is one
set of arrival speed segments adapted from each transition point to each vertex.
Each set may contain up to six segments.
SQUAWK (Mode, Code,
Function)- Activate specific modes/codes/functions on the aircraft
transponder; e.g., "Squawk three/alpha, two one zero five, low."
(See TRANSPONDER.)
STA-
(See SCHEDULED TIME OF
ARRIVAL.)
STAGING/QUEUING- The
placement, integration, and segregation of departure aircraft in designated
movement areas of an airport by departure fix, EDCT, and/or restriction.
STAND BY-
Means the controller or pilot must pause for a few seconds, usually to attend to
other duties of a higher priority. Also means to wait as in "stand by for
clearance." The caller should reestablish contact if a delay is lengthy. "Stand
by" is not an approval or denial.
STANDARD INSTRUMENT
APPROACH PROCEDURE (SIAP)-
(See INSTRUMENT APPROACH
PROCEDURE.)
STANDARD INSTRUMENT
DEPARTURE (SID)- A preplanned instrument flight rule (IFR) air traffic
control (ATC) departure procedure printed for pilot/controller use in graphic
form to provide obstacle clearance and a transition from the terminal area to
the appropriate en route structure. SIDs are primarily designed for system
enhancement to expedite traffic flow and to reduce pilot/controller workload.
ATC clearance must always be received prior to flying a SID.
(See IFR TAKEOFF MINIMUMS AND
DEPARTURE PROCEDURES.)
(See OBSTACLE DEPARTURE
PROCEDURE.)
(Refer to AIM.)
STANDARD RATE TURN- A turn
of three degrees per second.
STANDARD TERMINAL ARRIVAL-
A preplanned instrument flight rule (IFR) air traffic control arrival procedure
published for pilot use in graphic and/or textual form. STARs provide transition
from the en route structure to an outer fix or an instrument approach
fix/arrival waypoint in the terminal area.
STANDARD TERMINAL ARRIVAL
CHARTS-
(See AERONAUTICAL CHART.)
STANDARD TERMINAL
AUTOMATION REPLACEMENT SYSTEM (STARS)-
(See DTAS.)
STAR-
(See STANDARD TERMINAL
ARRIVAL.)
STATE AIRCRAFT- Aircraft
used in military, customs and police service, in the exclusive service of any
government, or of any political subdivision, thereof including the government of
any state, territory, or possession of the United States or the District of
Columbia, but not including any government-owned aircraft engaged in carrying
persons or property for commercial purposes.
STATIC RESTRICTIONS- Those
restrictions that are usually not subject to change, fixed, in place, and/or
published.
STATIONARY RESERVATIONS-
Altitude reservations which encompass activities in a fixed area. Stationary
reservations may include activities, such as special tests of weapons systems or
equipment, certain U.S. Navy carrier, fleet, and anti-submarine operations,
rocket, missile and drone operations, and certain aerial refueling or similar
operations.
STEP TAXI- To taxi a float
plane at full power or high RPM.
STEP TURN- A maneuver used
to put a float plane in a planing configuration prior to entering an active sea
lane for takeoff. The STEP TURN maneuver should only be used upon pilot request.
STEPDOWN FIX- A fix
permitting additional descent within a segment of an instrument approach
procedure by identifying a point at which a controlling obstacle has been safely
overflown.
STEREO ROUTE- A routinely
used route of flight established by users and ARTCCs identified by a coded name;
e.g., ALPHA 2. These routes minimize flight plan handling and communications.
STOL AIRCRAFT-
(See SHORT TAKEOFF AND
LANDING AIRCRAFT.)
STOP ALTITUDE
SQUAWK- Used by ATC to inform an aircraft to turn-off the automatic
altitude reporting feature of its transponder. It is issued when the verbally
reported altitude varies 300 feet or more from the automatic altitude report.
(See ALTITUDE READOUT.)
(See TRANSPONDER.)
STOP AND GO- A procedure
wherein an aircraft will land, make a complete stop on the runway, and then
commence a takeoff from that point.
(See LOW APPROACH.)
(See OPTION APPROACH.)
STOP BURST-
(See STOP STREAM.)
STOP BUZZER-
(See STOP STREAM.)
STOP SQUAWK (Mode or
Code)- Used by ATC to tell the pilot to turn specified functions of the
aircraft transponder off.
(See STOP ALTITUDE SQUAWK.)
(See TRANSPONDER.)
STOP STREAM-
Used by ATC to request a pilot to suspend electronic attack activity.
(See JAMMING.)
STOPOVER FLIGHT PLAN- A
flight plan format which permits in a single submission the filing of a sequence
of flight plans through interim full-stop destinations to a final destination.
STOPWAY- An area beyond
the takeoff runway no less wide than the runway and centered upon the extended
centerline of the runway, able to support the airplane during an aborted
takeoff, without causing structural damage to the airplane, and designated by
the airport authorities for use in decelerating the airplane during an aborted
takeoff.
STRAIGHT-IN APPROACH IFR-
An instrument approach wherein final approach is begun without first having
executed a procedure turn, not necessarily completed with a straight-in landing
or made to straight-in landing minimums.
(See LANDING MINIMUMS.)
(See STRAIGHT-IN APPROACH VFR.)
(See STRAIGHT-IN LANDING.)
STRAIGHT-IN APPROACH VFR-
Entry into the traffic pattern by interception of the extended runway centerline
(final approach course) without executing any other portion of the traffic
pattern.
(See TRAFFIC PATTERN.)
STRAIGHT-IN LANDING- A
landing made on a runway aligned within 30° of the final approach course
following completion of an instrument approach.
(See STRAIGHT-IN APPROACH IFR.)
STRAIGHT-IN LANDING
MINIMUMS-
(See LANDING MINIMUMS.)
STRAIGHT-IN MINIMUMS-
(See STRAIGHT-IN LANDING
MINIMUMS.)
STRATEGIC PLANNING-
Planning whereby solutions are sought to resolve potential conflicts.
SUBSTITUTE ROUTE- A route
assigned to pilots when any part of an airway or route is unusable because of
NAVAID status. These routes consist of:
a. Substitute
routes which are shown on U.S. Government charts.
b. Routes defined
by ATC as specific NAVAID radials or courses.
c. Routes defined
by ATC as direct to or between NAVAIDs.
SUNSET AND SUNRISE- The
mean solar times of sunset and sunrise as published in the Nautical Almanac,
converted to local standard time for the locality concerned. Within Alaska, the
end of evening civil twilight and the beginning of morning civil twilight, as
defined for each locality.
SUPER HIGH FREQUENCY- The
frequency band between 3 and 30 gigahertz (GHz). The elevation and azimuth
stations of the microwave landing system operate from 5031 MHz to 5091 MHz in
this spectrum.
SUPPLEMENTAL WEATHER
SERVICE LOCATION- Airport facilities staffed with contract personnel who take
weather observations and provide current local weather to pilots via telephone
or radio. (All other services are provided by the parent FSS.)
SUPPS- Refers to ICAO
Document 7030 Regional Supplementary Procedures. SUPPS contain procedures for
each ICAO Region which are unique to that Region and are not covered in the
worldwide provisions identified in the ICAO Air Navigation Plan. Procedures
contained in Chapter 8 are based in part on those published in SUPPS.
SURFACE AREA- The airspace
contained by the lateral boundary of the Class B, C, D, or E airspace designated
for an airport that begins at the surface and extends upward.
SURPIC- A description of
surface vessels in the area of a Search and Rescue incident including their
predicted positions and their characteristics.
(Refer to FAAO JO 7110.65,
Para 10-6-4, INFLIGHT CONTINGENCIES.)
SURVEILLANCE APPROACH- An
instrument approach wherein the air traffic controller issues instructions, for
pilot compliance, based on aircraft position in relation to the final approach
course (azimuth), and the distance (range) from the end of the runway as
displayed on the controller's radar scope. The controller will provide
recommended altitudes on final approach if requested by the pilot.
(Refer to
AIM.)
SWAP-
(See SEVERE WEATHER AVOIDANCE
PLAN.)
SWSL-
(See SUPPLEMENTAL WEATHER
SERVICE LOCATION.)
SYSTEM STRATEGIC
NAVIGATION- Military activity accomplished by navigating along a preplanned
route using internal aircraft systems to maintain a desired track. This activity
normally requires a lateral route width of 10 NM and altitude range of 1,000
feet to 6,000 feet AGL with some route segments that permit terrain following.
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