(3)
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.

(4)
PROHIBITED AREA - Designated airspace within which the flight of aircraft is prohibited. (Refer to Enroute Charts)

(5)
RESTRICTED AREA - Airspace designated under Federal Air Regulations, 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 Air Traffic Control facility when it is not being utilized by the using agency. Restricted areas are depicted on enroute charts. Where joint use is authorized, the name of the Air Traffic Control control facility is also shown. (Refer to Federal Air Regulations, Part 73)

(6)
WARNING AREA - Airspace which may contain hazards to nonparticipating aircraft in international airspace.

SPECIAL AIRCREW AND AIRCRAFT AUTHORIZATION REQUIRED (SAAAR) - Indicates additional aircrew training, appropriate aircraft equipment, and operational approval required to fly specified instrument procedures.
SPECIAL VFR CONDITIONS - Weather conditions in a Control Zone which are less than basic VFR and in which some aircraft are permitted flight under Visual Flight Rules. (See Special VFR Operations) (Refer to Federal Air Regulations Part 91)
SPECIAL VFR FLIGHT (ICAO) - A controlled VFR flight authorized by Air Traffic Control to operate within a Control Zone under Meteorological conditions below the Visual Meteorological Conditions.
SPECIAL VFR OPERATIONS - Aircraft operating in accordance with clearances within Control Zones in weather conditions less than the basic VFR weather minima. Such operations must be requested by the pilot and approved by Air Traffic Control. (See Special VFR Conditions)
SPEED - (See Airspeed, Groundspeed)
SPEED ADJUSTMENT - An Air Traffic Control 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 specified speed.
Examples of speed adjustments are:
(1) “Increase/reduce speed to mach point (number)”.
(2) “Increase/reduce speed to (speed in knots)”, or “Increase/reduce speed (number of knots) knots”.
NOTE: See General Planning, paragraph 5-28 b.
SPEED BRAKES/DIVE BRAKES - Moveable aerodynamic devices on aircraft that reduce airspeed during descent and landing.
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)
STANAGS - NATO STANDARDIZATION AGREEMENTS - Represent agreements among participating NATO countries outlining common operational procedures.