Aircraft Speed

Aircraft speed is regulated based on the type of airspace, operation, and proximity of the aircraft to hazards.

Aircraft Speed

Introduction to Aircraft Speed

  • Same as you have speed limits on the road, they exist in the sky
  • Their purposes is to facilitate the most safe and efficient flow of traffic, especially in the low altitude and terminal structure
  • Reinforce your understanding of Aircraft Speed by completing the knowledge quiz and interactive scenario, comparing your performance with the applicable Airman Certification Standards, and reviewing the topic summary before moving on.
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Aircraft Speed

Aircraft Speed Key Highlights

  • Aircraft speed regulations establish operational speed limitations to improve safety, traffic flow, and collision avoidance within the National Airspace System.
  • FAA regulations specify maximum indicated airspeeds for operations below certain altitudes and within designated airspace areas.
  • Aircraft operating below 10,000 feet mean sea level are generally limited to 250 knots indicated airspeed unless otherwise authorized.
  • Speed restrictions near airports and within Class B airspace help reduce traffic conflicts and improve sequencing efficiency.
  • Pilots must comply with published speed limitations, ATC instructions, and aircraft operating limitations during flight operations.
  • Aircraft design speeds such as maneuvering speed, flap operating speed, and never-exceed speed are critical operational limitations.
  • Excessive speed can increase structural loads, reduce reaction time, and compromise aircraft controllability during maneuvers.
  • Weather conditions, turbulence, traffic density, and aircraft performance influence safe speed management decisions.
  • Modern avionics and autopilot systems may assist pilots with airspeed monitoring and speed compliance during flight operations.
  • Understanding aircraft speed regulations improves operational compliance, traffic management awareness, and overall flight safety.
Aircraft Speed

Airspeed Terms and Aircraft Operating Speeds

  • Indicated airspeed (IAS) is the uncorrected airspeed shown on the airspeed indicator. It is the airspeed normally used for aircraft limitations and pilot-controller speed communications unless another type is specified.
  • Calibrated airspeed (CAS) is IAS corrected for instrument and position error. Use the POH (Pilot's Operating Handbook) or AFM (Aircraft Flight Manual) calibration data for the applicable aircraft configuration.
  • True airspeed (TAS) is the aircraft's speed through the surrounding air mass; it is CAS corrected for atmospheric pressure and temperature. Groundspeed is the aircraft's rate of movement across the surface after the wind vector is applied.
  • VFE is maximum flap-extended speed, VNO is maximum structural cruising speed, and VNE is never-exceed speed. Use the aircraft-specific POH or AFM values and configuration limits.
  • Maneuvering speed normally decreases as aircraft weight decreases. Use manufacturer guidance; VA does not protect against every gust or multiple or sustained full control inputs.
  • For significant turbulence, use the manufacturer's turbulent-air penetration speed or applicable maneuvering-speed guidance for the aircraft's weight and conditions, and avoid abrupt control inputs.
  • Approach-speed targets should account for aircraft guidance, weight, wind, configuration, runway, and conditions. Excess speed or a tailwind increases groundspeed, energy, landing distance, and runway-excursion risk.
Aircraft Speed

Civil Speed Regulations

  • Unless otherwise authorized by the administrator, no person may operate an aircraft below 10,000' MSL at an indicated airspeed of more than 250 knots (288 mph)
  • Unless otherwise authorized or required by ATC, no person may operate an aircraft at or below 2,500' AGL within 4 NM of the primary airport of Class C or Class D airspace at an indicated airspeed of more than 200 knots (230 mph). This paragraph does not apply to operations within Class B airspace.
  • No person may operate an aircraft in the airspace underlying a class B airspace area designated for an airport or in a VFR corridor designated through such a class B airspace area, at an indicated airspeed of more than 200 knots (230 mph)
    • However, inside of class B aircraft below 10,000' MSL (Mean Sea Level) are authorized to fly in excess of 200 knots but no more than 250 knots
  • If the minimum safe airspeed for any particular operation is greater than the maximum prescribed speed, the aircraft may be operated at that minimum speed
Aircraft Speed

Speed Adjustments

  • When ATC combines a speed adjustment with a descent clearance, the sequence of delivery, with the word "then" between, indicates the expected order of execution
    • ATC: "Descend and maintain [altitude]; then, reduce speed to [speed]"
    • ATC: "Reduce speed to [speed]; then, descend and maintain [altitude]"
  • Approach clearances supersede any prior speed adjustments, and pilots are expected to make their own speed adjustments, as necessary to complete the approach
  • Under certain circumstances, however, it may be necessary for ATC to issue further speed adjustments after approach clearance is issued to maintain separation between successive arrivals
    • Under such circumstances, previously issued speed adjustments will be restated if that speed is to be maintained or additional speed adjustments are requested
    • Speed adjustments should not be assigned inside the FAF (Final Approach Fix) on final or a point 5 miles from the runway, whichever is closer to the runway
      • "Resume normal speed" does not delete speed restrictions that are contained in a published procedure unless specified
  • The pilots retain the prerogative of rejecting the application of speed adjustment by ATC if the minimum safe airspeed for any particular operation is greater than the speed adjustment
  • Pilots are reminded that they are responsible for rejecting a speed adjustment from ATC if it would cause them to exceed an aircraft limitation or a maximum indicated airspeed prescribed by 14 CFR 91.117(a), (b), or (c)
    • Inform ATC if unable to comply
  • Pilots operating at or above 10,000' MSL who are issued speed adjustments which exceed 250 knots IAS and are subsequently cleared below 10,000' MSL are expected to comply with FAR (Federal Aviation Regulations) 91.117(a)
  • Speed restrictions of 250 knots do not apply to U.S. Registered aircraft operating beyond 12 nm from the coastline within the U.S. Flight Information Region, in Class E airspace below 10,000' MSL
    • However, in airspace underlying a Class B airspace area, pilots are expected to comply with the 200 knot speed limit in FAR 91.117(c) 200 knots indicated airspeed (KIAS) (230 MPH (miles per hour))
  • For operations in a Class C and Class D surface area, ATC is authorized to request or approve a speed greater than the maximum indicated airspeeds prescribed for operation within that airspace in FAR 91.117(b) 200 KIAS (230 MPH)
  • When communications with ARTCC (Air Route Traffic Control Center) or approach control facility, pilots should, as a good operating practice, state any ATC assigned speed restriction on initial radio contact associated with an ATC communications frequency change
Aircraft Speed

Responsibilities

  • Pilot Responsibilities:

    • Advises ATC any time cruising airspeed varies plus or minus 5% or 10 knots, whichever is greater from that given in the flight plan.
    • Complies with speed adjustments from ATC unless:
      • The minimum or maximum safe airspeed for any particular operation is greater or less than the requested airspeed.
        • It is the pilot's responsibility and prerogative to advise ATC of, and refuse, speed adjustments considered excessive or contrary to the aircraft's operating specifications.
      • Operating at or above 10,000 feet MSL on an ATC assigned SPEED ADJUSTMENT of more than 250 knots IAS and subsequent clearance is received for descent below 10,000 feet MSL.
        • In such cases, pilots are expected to comply with 14 CFR (Code of Federal Regulations) Section 91.117(a).
    • When complying with speed adjustment assignments, maintains an indicated airspeed within plus or minus 10 knots or 0.02 Mach number of the specified speed.

  • Controller Responsibilities:

    • Assigns speed adjustments to aircraft when necessary but not as a substitute for good vectoring technique.
    • Adheres to the restrictions published in FAA Order JO 7110.65, Air Traffic Control, as to when speed adjustment procedures may be applied.
    • Avoids alternating increase and decreasing airspeeds.
    • Assigns speed adjustments to a specified IAS (KNOTS)/Mach number or to increase or decrease speed using increments of 5 knots or multiples thereof.
    • Terminates ATC-assigned speed adjustments when no longer required by issuing further instructions to pilots in the following manner:
      • Advises pilots to "resume normal speed" when the aircraft is on a heading, random routing, charted procedure, or route without published speed restrictions.
      • Instructs pilots to "comply with speed restrictions" when the aircraft is joining or resuming a charted procedure or route with published speed restrictions.
        • CAUTION-The phraseology "Climb via SID" requires compliance with all altitude and/or speed restrictions depicted on the procedure.
      • Instructs pilots to "resume published speed" when aircraft are cleared via a charted instrument flight procedure that contains published speed restrictions.
      • Advises aircraft to "delete speed restrictions" when ATC assigned or published speed restrictions on a charted procedure are no longer required.
      • Clears pilots for approach without restating previously issued speed adjustments.
    • Gives due consideration to aircraft capabilities to reduce speed while descending.
    • Does not assign speed adjustments to aircraft at or above FL (Flight Level) 390 without pilot consent.
Aircraft Speed

Airspace Speed Restrictions

  • Depending on the type of airspace in which you operate, speed limits do apply

  • Class Alpha Airspace:

  • Class Bravo Airspace:

    • No speed restriction inside class bravo airspace when above 10,000 ft
    • 250 knots inside of class bravo airspace, when below 10,000 ft
    • Descents below 10,000 ft, require speed reduction to 250 knots, regardless of prior assignments
    • 200 knots under the airspace or in a corridor.
    • Speed of 250 knots must not be exceeded, even if you are told to "maintain best forward speed"

  • Class Charlie Airspace:

    • Unless otherwise authorized or required by ATC, no person may operate an aircraft at or below 2,500' AGL within 4 NM of the primary airport of a Class C airspace area at an indicated airspeed of more than 200 knots (230 mph).

  • Class Delta Airspace:

    • Unless otherwise authorized or required by ATC, no person may operate an aircraft at or below 2,500' AGL within 4 NM of the primary airport of a Class D airspace area at an indicated airspeed of more than 200 knots (230 mph).

  • Class Echo Airspace:

    • 250 knots below 10,000' MSL within class echo airspace.
    • While operating in the traffic pattern at an airport without an operating control tower, it is recommended that the pilot maintain an airspeed of no more than 200 KIAS

  • Class Golf Airspace:

Aircraft Speed

Instrument Procedures

  • When the approach procedure involves a procedure turn, a maximum speed of not greater than 200 knots (IAS) should be observed from first overheading the course reversal IAF (Initial Approach Fix) through the procedure turn maneuver to ensure containment within the obstruction clearance area
Aircraft Speed

Supersonic Flight Operations

  • Commanding officers assigned aircraft capable of supersonic flight shall ensure that aircrews are thoroughly familiar with the shock wave phenomenon peculiar to supersonic flight. Serious damage, annoyance, and mental stress have resulted from sonic booms. It is incumbent on every pilot flying aircraft capable of generating sonic booms to reduce such disturbances and damage to the absolute minimum dictated by operational/training requirements
  • Policy:
    • Supersonic flight operations shall be strictly controlled and supervised by operational commanders. Supersonic flight over land or within 30 miles offshore shall be conducted in specifically designated areas. Such areas must be chosen to ensure minimum possibility of disturbance. As a general policy, sonic booms shall not be intentionally generated below 30,000' of altitude unless over water and more than 30 miles from inhabited land areas or islands. Deviations from the foregoing general policy may be authorized only under one of the following:
      • Tactical missions that require supersonic speeds
      • Phases of formal training syllabus flights requiring supersonic speeds
      • Research, test, and operational suitability test flights requiring supersonic speeds
      • When specifically authorized by CNO for flight demonstration purposes
  • Reports, Inquiries, and Investigations:
    • The Department of the Navy must accept responsibility for restitution and payment of just claims for damage resulting from sonic booms determined to have been caused by naval aircraft
    • To assist in determining validity of claims, all supersonic flights conducted over the CONUS or within 50 miles offshore shall be logged as to time, date, location, speed, and altitude of occurrence and retained at the unit level for 24 months
    • Section 0910f of reference (r) provides information and instructions concerning investigations into sonic boom complaints and alleged damage claims
Aircraft Speed

Small Unmanned Aircraft Systems Speed Limitations

  • The groundspeed of the small unmanned aircraft may not exceed 87 knots (100 miles per hour)
Aircraft Speed

Aircraft Speed Interactive Scenario

General aviation aircraft representing operating and speed regulations.

The Fast Arrival Into Metro

Manage a fast airplane from cruise through Class B shelves, a Class D terminal area, ATC speed requests, turbulence, configuration limits, and a stabilized landing without confusing regulatory maxima with safe targets. Abbreviations used in this scenario: Pilot in Command (PIC).

15 DecisionsScenario-Based TrainingSpeed LimitationsConsequence-BasedRetry and Debrief
Decision 1
0%

Scenario Complete

Aircraft Speed

Aircraft Speed Knowledge Check

Choose the knowledge check that matches your current training for Aircraft Speed.

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PPL knowledge check

Core Knowledge Review

Review foundational knowledge, key concepts, and practical considerations. Topic: Aircraft Speed.

  • Immediate feedback
  • Answer explanations
  • Account progress tracking

Why Take a Quiz?

Quizzes reinforce key concepts, identify knowledge gaps, and build confidence for real-world decisions. Quiz material is representative of the information provided here and is not based on or sourced from the Federal Aviation Administration test bank.

Aircraft Speed

Aircraft Speed Conclusion

  • Controller regulations are published in FAA Order JO 7110.65, Air Traffic Control, as to when speed adjustment procedures may be applied
  • When ATC asks for an airspeed, it is referring to indicated airspeed.
  • Under rare instances (such as military fighters), if the minimum safe airspeed for any particular operation is greater than the maximum speed prescribed in this section, the aircraft may be operated at that minimum speed. Note: There is no requirement to advise ATC when exceeding a speed for this reason
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Aircraft Speed

Aircraft Speed References