background image

Pilot/Controller Glossary

3/29/18

PCG S−5

other during simultaneous dependent operations.

Integral parts of a total system ATC procedures, and

appropriate airborne and ground based equipment.

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 CHART SUPPLEMENT U.S.)

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 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.

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

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