Pilot/Controller Glossary

SPEED ADVISORY- Speed advisories that are generated within Time-Based Flow Management to assist
controllers to meet the Scheduled Time of Arrival (STA) at the meter fix/meter arc. See also Ground-Based
Interval Management-Spacing (GIM-S) Speed Advisory.
SQUAWK (Mode, Code, Function)- Used by ATC to instruct a pilot to activate the aircraft transponder and
ADS-B Out with altitude reporting enabled, or (military) to activate only specific modes, codes, or functions.
Examples: "Squawk five seven zero seven;" "Squawk three/alpha, two one zero five."
(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 (STAR)- 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 AIRSPACE RESERVATION- The term used in oceanic ATC for airspace that encompasses
activities in a fixed volume of airspace to be occupied for a specified time period. Stationary Airspace
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.
(See STATIONARY ALTITUDE RESERVATION.)