FLIGHT INFORMATION PUBLICATION GENERAL PLANNING(75)

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SLASH - A radar beacon reply displayed as an elongated target.
SLOW TAXI - To taxi a float plane at low power or low Revolutions Per Minute.
SPEAK SLOWER - Used in verbal communications as a request to reduce speech rate.
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 (P/CG) - 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:
(1) 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 Air Regulations and pilots of participating aircraft as well as pilots transiting the area are equally responsible for collision avoidance.
(2)
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.

(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”.
　
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