Aeronautical Terms beginning with S
SALS
Short Approach Light System.
SATCOM
Satellite Communications.
Sea level engine
A reciprocating aircraft engine having a rated takeoff power that is producible only at sea level.
Second in command
A pilot who is designated to be second in command of an aircraft during flight time.
Show
Unless the context otherwise requires, to show to the satisfaction of the Administrator.
Small aircraft
Aircraft of 12,500 pounds or less, maximum certificated takeoff weight.
Special VFR conditions
Meteorological conditions that are less than those required for basic VFR flight in controlled airspace and in which some aircraft are permitted flight under visual flight rules.
Special VFR operations
Aircraft operating in accordance with clearances within controlled airspace in meteorological conditions less than the basic VFR weather minima. Such operations must be requested by the pilot and approved by ATC.
SSALS
Simplified Short Approach Light System.
SSALSR
Simplified Short Approach Light System with Runway Alignment Indicator Lights.
Standard atmosphere
The atmosphere defined in U.S. Standard Atmosphere, 1962 (Geopotential altitude tables).
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.
Suitable RNAV system
An RNAV system that meets the required performance established for a type of operation, e.g. IFR; and is suitable for operation over the route to be flown in terms of any performance criteria (including accuracy) established by the air navigation service provider for certain routes (e.g. oceanic, ATS routes, and IAPs). An RNAV system’s suitability is dependent upon the availability of ground and/or satellite navigation aids that are needed to meet any route performance criteria that may be prescribed in route specifications to navigate the aircraft along the route to be flown. Information on suitable RNAV systems is published in FAA guidance material.
Synthetic vision
A computer-generated image of the external scene topography from the perspective of the flight deck that is derived from aircraft attitude, high-precision navigation solution, and database of terrain, obstacles and relevant cultural features.
Synthetic vision system
An electronic means to display a synthetic vision image of the external scene topography to the flight crew.
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