ADX Test
FAA Airman Knowledge Test for Aircraft Dispatcher.
Getting Started: Your ADX Journey
Free knowledge base
FAA Aircraft Dispatcher (ADX) — key terms, tricks & tips
Everything from the course in one searchable place: 217 entries. Use it to review before a practice test or look up a word you forgot.
217 results
ACS
Airman Certification Standards; FAA's guide for test content.
Getting Started: Your ADX Journey
Part 121
Federal Aviation Regulations for scheduled air carriers.
Getting Started: Your ADX Journey
METAR
Aviation routine weather report; current weather conditions.
Getting Started: Your ADX Journey
TAF
Terminal Aerodrome Forecast; expected weather conditions.
Getting Started: Your ADX Journey
Flight Planning
Process of preparing for a flight, including route, fuel, and alternates.
Getting Started: Your ADX Journey
Aircraft Performance
How an aircraft operates under various conditions.
Getting Started: Your ADX Journey
Weight and Balance
Calculations to ensure aircraft is loaded safely.
Getting Started: Your ADX Journey
Understanding the FAA ADX Airman Knowledge Test
To remember the key test areas: 'FARs, Weather, Performance, Navigation' – F.W.P.N. (Like 'FiWPAN' for the test).
Getting Started: Your ADX Journey
Understanding the FAA ADX Airman Knowledge Test
The ADX test will often present scenarios requiring you to apply Part 121 regulations, especially regarding fuel requirements, dispatch release contents, and operational control. Memorize the specific fuel reserve requirements for Part 121 operations.
Getting Started: Your ADX Journey
Understanding the FAA ADX Airman Knowledge Test
Underestimating the depth of knowledge required, focusing only on memorizing answers.
Getting Started: Your ADX Journey
Understanding the FAA ADX Airman Knowledge Test
Neglecting to practice chart and graph interpretation, leading to slow or incorrect answers.
Getting Started: Your ADX Journey
Understanding the FAA ADX Airman Knowledge Test
Not thoroughly reviewing the Airman Certification Standards (ACS) as the primary study guide.
Getting Started: Your ADX Journey
Area of Operation
Major categories of tasks within the ACS.
Getting Started: Your ADX Journey
Task
Specific duties or actions within an Area of Operation.
Getting Started: Your ADX Journey
Knowledge Element
Specific facts or concepts to be understood.
Getting Started: Your ADX Journey
Risk Management Element
Potential hazards and strategies for mitigation.
Getting Started: Your ADX Journey
Skill Element
Actions or abilities to be demonstrated.
Getting Started: Your ADX Journey
Practical Test Standards (PTS)
Predecessor to ACS, focused more on practical skills.
Getting Started: Your ADX Journey
Navigating the Airman Certification Standards (ACS)
ACS: Always Certify Safely! It's your roadmap to a safe and certified career.
Getting Started: Your ADX Journey
Navigating the Airman Certification Standards (ACS)
For the ADX knowledge test, questions are often directly linked to specific ACS codes. When studying, identify the ACS code for each topic to understand the depth of knowledge required. Look for keywords like 'explain,' 'identify,' or 'apply' within the knowledge elements.
Getting Started: Your ADX Journey
Navigating the Airman Certification Standards (ACS)
Only memorizing facts without understanding the 'why' or associated risks.
Getting Started: Your ADX Journey
Navigating the Airman Certification Standards (ACS)
Not using the current version of the ADX ACS document.
Getting Started: Your ADX Journey
Navigating the Airman Certification Standards (ACS)
Ignoring the Risk Management elements, assuming they are only for the practical exam.
Getting Started: Your ADX Journey
14 CFR Part 121
Regulations for domestic, flag, and supplemental air carriers.
Regulations: The Backbone of Dispatch
Domestic Operations
Commercial flights solely within the 48 contiguous US/DC.
Regulations: The Backbone of Dispatch
Flag Operations
Commercial flights between US and foreign countries.
Regulations: The Backbone of Dispatch
Supplemental Operations
Unscheduled commercial passenger/cargo flights.
Regulations: The Backbone of Dispatch
Operational Control
Exercising authority over initiating, conducting, terminating a flight.
Regulations: The Backbone of Dispatch
Air Carrier Certificate
FAA authorization for commercial air transportation.
Regulations: The Backbone of Dispatch
Operations Specifications
Detailed rules and limitations for an air carrier.
Regulations: The Backbone of Dispatch
Introduction to 14 CFR Part 121 Operations
Think of '121' as 'One-to-One Safety' – one pilot, one dispatcher, ensuring safety for every single flight, covering everything from origin to destination.
Regulations: The Backbone of Dispatch
Introduction to 14 CFR Part 121 Operations
Memorize the three types of Part 121 operations: Domestic, Flag, and Supplemental. The ADX exam often tests your ability to differentiate between them based on flight origin and destination.
Regulations: The Backbone of Dispatch
Introduction to 14 CFR Part 121 Operations
Confusing Part 121 with Part 91 (general aviation) or Part 135 (smaller commercial operations).
Regulations: The Backbone of Dispatch
Introduction to 14 CFR Part 121 Operations
Underestimating the dispatcher's joint responsibility for operational control under Part 121.
Regulations: The Backbone of Dispatch
Introduction to 14 CFR Part 121 Operations
Not understanding that different types of 121 operations (domestic, flag, supplemental) have specific, varying requirements.
Regulations: The Backbone of Dispatch
Shared Responsibility
PIC and dispatcher jointly accountable for flight safety.
Regulations: The Backbone of Dispatch
Dispatch Release
Authorization for flight, signed by PIC and dispatcher.
Regulations: The Backbone of Dispatch
14 CFR Part 121.533
Regulation defining dispatcher/PIC responsibilities.
Regulations: The Backbone of Dispatch
Delay
Postponing a flight's departure.
Regulations: The Backbone of Dispatch
Divert
Changing a flight's destination en route.
Regulations: The Backbone of Dispatch
Cancel
Terminating a flight before or during its operation.
Regulations: The Backbone of Dispatch
Dispatcher Responsibilities & Authority (121.533)
PIC-DISPATCHER: 'P'lan, 'I'nitiate, 'C'ontinue, 'D'ivert, 'I'nform, 'S'afety, 'P'rotect, 'A'uthorize, 'T'erminate, 'C'oordinate, 'H'andle, 'E'nsure, 'R'esponsible. They share ALL these duties!
Regulations: The Backbone of Dispatch
Dispatcher Responsibilities & Authority (121.533)
Memorize that 14 CFR Part 121.533 is the specific regulation that details the shared operational control responsibilities between the aircraft dispatcher and the pilot-in-command. Look for questions about 'joint responsibility' or 'shared authority.'
Regulations: The Backbone of Dispatch
Dispatcher Responsibilities & Authority (121.533)
Assuming the PIC has sole authority for all decisions once airborne; the dispatcher retains significant operational control.
Regulations: The Backbone of Dispatch
Dispatcher Responsibilities & Authority (121.533)
Believing the dispatcher's role is purely advisory; they have direct authority to delay, divert, or cancel flights.
Regulations: The Backbone of Dispatch
Dispatcher Responsibilities & Authority (121.533)
Not understanding that both the PIC and dispatcher must agree for a flight to be initiated or continued safely.
Regulations: The Backbone of Dispatch
Flight Release
Document authorizing a Part 121 flight to depart.
Regulations: The Backbone of Dispatch
Amendment (Release)
Minor modification to an existing flight release.
Regulations: The Backbone of Dispatch
Reissue (Release)
Creating a new flight release due to significant changes.
Regulations: The Backbone of Dispatch
Domestic Operation
Operations within the 48 contiguous states and DC.
Regulations: The Backbone of Dispatch
Flag Operation
Operations outside the 48 contiguous states and DC.
Regulations: The Backbone of Dispatch
Supplemental Operation
On-demand common carriage (e.g., charter flights).
Regulations: The Backbone of Dispatch
Operational Control & Flight Release Requirements
Think of a 'Release' as a 'Green Light' for the flight, but it's only 'Green' if the 'Dispatcher' and 'Pilot' both say 'Go'!
Regulations: The Backbone of Dispatch
Operational Control & Flight Release Requirements
For the exam, remember that operational control is *jointly* exercised by the dispatcher and PIC. Keywords like 'joint responsibility' or 'mutual agreement' are key. Also, know the specific items required on a domestic/flag flight release per 14 CFR 121.687.
Regulations: The Backbone of Dispatch
Operational Control & Flight Release Requirements
Assuming the dispatcher has sole operational control; it's always joint with the PIC.
Regulations: The Backbone of Dispatch
Operational Control & Flight Release Requirements
Forgetting that a flight release is required for *every* Part 121 flight, not just international ones.
Regulations: The Backbone of Dispatch
Operational Control & Flight Release Requirements
Confusing an amendment with a reissuance; significant changes require a reissuance, not just an amendment.
Regulations: The Backbone of Dispatch
Airworthiness
Aircraft conforms to type design and is safe for flight.
Regulations: The Backbone of Dispatch
Type Design
Approved configuration, components, and limitations of an aircraft.
Regulations: The Backbone of Dispatch
Maintenance Release
Document signed by mechanic allowing aircraft to return to service.
Regulations: The Backbone of Dispatch
MEL
Minimum Equipment List; allows operation with specific inoperative items.
Regulations: The Backbone of Dispatch
MMEL
Master Minimum Equipment List; FAA-approved basis for operator MELs.
Regulations: The Backbone of Dispatch
CDL
Configuration Deviation List; allows operation with specific missing parts.
Regulations: The Backbone of Dispatch
M Procedure
Maintenance procedure required by the MEL for an inoperative item.
Regulations: The Backbone of Dispatch
O Procedure
Operational procedure required by the MEL for an inoperative item.
Regulations: The Backbone of Dispatch
Aircraft Airworthiness, Maintenance & MEL/CDL
MEL for 'Malfunctioning Equipment List', CDL for 'Cosmetic Deviation List' (even though it's not just cosmetic, it helps remember missing parts).
Regulations: The Backbone of Dispatch
Aircraft Airworthiness, Maintenance & MEL/CDL
For the ADX exam, memorize that the MEL is specific to an aircraft operator and tail number, derived from the FAA-approved MMEL. Also, distinguish that the MEL is for inoperative equipment, while the CDL is for missing non-structural parts.
Regulations: The Backbone of Dispatch
Aircraft Airworthiness, Maintenance & MEL/CDL
Confusing the MEL (inoperative equipment) with the CDL (missing parts).
Regulations: The Backbone of Dispatch
Aircraft Airworthiness, Maintenance & MEL/CDL
Forgetting that 'M' and 'O' procedures in the MEL must be completed or accounted for.
Regulations: The Backbone of Dispatch
Aircraft Airworthiness, Maintenance & MEL/CDL
Failing to apply performance penalties from the CDL to fuel calculations.
Regulations: The Backbone of Dispatch
Troposphere
Lowest atmospheric layer where all weather occurs.
Meteorology: Mastering the Weather
Density Altitude
Pressure altitude corrected for non-standard temperature.
Meteorology: Mastering the Weather
Dew Point
Temperature at which air becomes saturated with moisture.
Meteorology: Mastering the Weather
Stable Air
Air that resists vertical motion, leading to stratiform clouds.
Meteorology: Mastering the Weather
Unstable Air
Air that promotes vertical motion, leading to cumuliform clouds.
Meteorology: Mastering the Weather
Air Mass
Large body of air with uniform temperature and moisture.
Meteorology: Mastering the Weather
Front
Boundary between two contrasting air masses.
Meteorology: Mastering the Weather
Atmospheric Principles & Weather Phenomena
Think of 'STABle' air as 'STAYING' put, leading to 'STeaDy' rain and 'STratiform' clouds. 'UNstable' air is 'UP' and 'AWAY,' causing 'UPdrafts' and 'CUMULUS' clouds.
Meteorology: Mastering the Weather
Atmospheric Principles & Weather Phenomena
For the ADX exam, precisely recall the characteristics of stable vs. unstable air (e.g., stable air = stratiform clouds, steady precipitation, poor visibility; unstable air = cumuliform clouds, showery precipitation, good visibility). Keywords to spot: 'lapse rate,' 'dew point,' 'density altitude,' 'cold front,' 'warm front.'
Meteorology: Mastering the Weather
Atmospheric Principles & Weather Phenomena
Confusing stable and unstable air characteristics, especially regarding cloud types and precipitation.
Meteorology: Mastering the Weather
Atmospheric Principles & Weather Phenomena
Underestimating the impact of high density altitude on aircraft performance, particularly at high-altitude airports or during hot weather.
Meteorology: Mastering the Weather
Atmospheric Principles & Weather Phenomena
Not recognizing the difference in weather associated with cold fronts versus warm fronts.
Meteorology: Mastering the Weather
PIREP
Pilot Report, in-flight observations by pilots.
Meteorology: Mastering the Weather
SPECI
Special METAR report for significant weather changes.
Meteorology: Mastering the Weather
RMK
Remarks section in METARs for additional info.
Meteorology: Mastering the Weather
TEMPO
Temporary conditions in a TAF, lasting less than an hour.
Meteorology: Mastering the Weather
OVC
Overcast, 8/8ths of the sky covered by clouds.
Meteorology: Mastering the Weather
A2992
Altimeter setting of 29.92 inches of mercury.
Meteorology: Mastering the Weather
Decoding METARs, TAFs, & PIREPs
METAR is 'M' for 'Moment' (current), TAF is 'T' for 'Tomorrow' (forecast), PIREP is 'P' for 'Pilot' (in-flight observation).
Meteorology: Mastering the Weather
Decoding METARs, TAFs, & PIREPs
For the ADX exam, memorize the exact abbreviations for present weather (e.g., +SN for heavy snow, DZ for drizzle) and sky conditions (FEW, SCT, BKN, OVC). Pay close attention to time groups (Z-time) and how 'FM', 'TEMPO', and 'PROB' affect TAF validity periods.
Meteorology: Mastering the Weather
Decoding METARs, TAFs, & PIREPs
Confusing METAR (current) with TAF (forecast) when making immediate operational decisions.
Meteorology: Mastering the Weather
Decoding METARs, TAFs, & PIREPs
Ignoring the 'RMK' section of a METAR, which often contains critical unforecasted information.
Meteorology: Mastering the Weather
Decoding METARs, TAFs, & PIREPs
Misinterpreting time groups in TAFs, especially 'FM', 'TEMPO', and 'PROB', leading to incorrect forecast application.
Meteorology: Mastering the Weather
Surface Analysis Chart
Depicts observed surface weather conditions.
Meteorology: Mastering the Weather
Prognostic Chart
Forecasts future weather conditions.
Meteorology: Mastering the Weather
NEXRAD
Next Generation Radar, shows precipitation intensity.
Meteorology: Mastering the Weather
Visible Satellite
Shows clouds as seen by the human eye (daylight).
Meteorology: Mastering the Weather
Infrared Satellite
Detects cloud top temperatures (day/night).
Meteorology: Mastering the Weather
Water Vapor Satellite
Shows moisture in the mid/upper atmosphere.
Meteorology: Mastering the Weather
Isobars
Lines connecting points of equal pressure.
Meteorology: Mastering the Weather
Station Model
Symbolic representation of surface weather data.
Meteorology: Mastering the Weather
Weather Charts, Radar & Satellite Imagery
To remember the satellite types: 'V'isible for 'V'iewing clouds by day. 'I'nfrared for 'I'cing (temperature) day or night. 'W'ater 'V'apor for 'W'etness in the atmosphere.
Meteorology: Mastering the Weather
Weather Charts, Radar & Satellite Imagery
On the ADX exam, pay close attention to the symbols used on surface analysis charts for fronts and pressure systems. Also, differentiate between the capabilities and limitations of radar (precipitation, but not clear air) and satellite (cloud cover, moisture, day/night). Keywords: 'observed conditions,' 'forecast conditions,' 'precipitation intensity,' 'cloud tops.'
Meteorology: Mastering the Weather
Weather Charts, Radar & Satellite Imagery
Relying on only one weather product instead of cross-referencing multiple sources.
Meteorology: Mastering the Weather
Weather Charts, Radar & Satellite Imagery
Misinterpreting the scale or valid time of a chart, leading to outdated information.
Meteorology: Mastering the Weather
Weather Charts, Radar & Satellite Imagery
Assuming radar shows all hazardous weather, forgetting it doesn't detect clear-air turbulence or non-precipitating clouds.
Meteorology: Mastering the Weather
Thunderstorm
Severe weather with lightning, thunder, strong winds.
Meteorology: Mastering the Weather
Microburst
Intense localized downdraft causing dangerous wind shear.
Meteorology: Mastering the Weather
Structural Icing
Ice forming on external aircraft surfaces.
Meteorology: Mastering the Weather
Clear Ice
Smooth, dense, transparent ice, very hazardous.
Meteorology: Mastering the Weather
Turbulence
Irregular atmospheric motion causing aircraft jolts.
Meteorology: Mastering the Weather
Wind Shear
Sudden change in wind speed or direction.
Meteorology: Mastering the Weather
CAT
Clear Air Turbulence, invisible, often near jet streams.
Meteorology: Mastering the Weather
Hazardous Weather: Thunderstorms, Icing, Turbulence
To remember the three ingredients for a thunderstorm: 'M.L.I. - Moisture, Lift, Instability'. Think of a 'Mighty Lightning Ingredient'!
Meteorology: Mastering the Weather
Hazardous Weather: Thunderstorms, Icing, Turbulence
For the ADX exam, memorize the three requirements for thunderstorm formation (moisture, lift, instability) and the three stages of a thunderstorm. Pay close attention to the hazards associated with each type of icing (rime vs. clear) and the causes of different turbulence types.
Meteorology: Mastering the Weather
Hazardous Weather: Thunderstorms, Icing, Turbulence
Underestimating the 20-nautical mile avoidance rule for thunderstorms; associated hazards extend beyond the visible cloud.
Meteorology: Mastering the Weather
Hazardous Weather: Thunderstorms, Icing, Turbulence
Confusing rime ice with clear ice; clear ice is generally more dangerous due to its density and rapid accumulation.
Meteorology: Mastering the Weather
Hazardous Weather: Thunderstorms, Icing, Turbulence
Ignoring PIREPs, especially for turbulence; they provide critical real-time hazard information not always visible on radar.
Meteorology: Mastering the Weather
V1 Speed
Decision speed; pilot must decide to abort or continue takeoff.
Flight Planning & Performance: Optimizing Every Flight
V2 Speed
Takeoff safety speed; minimum speed for safe climb after engine failure.
Flight Planning & Performance: Optimizing Every Flight
Climb Gradient
Ratio of altitude gained to horizontal distance covered.
Flight Planning & Performance: Optimizing Every Flight
Long-Range Cruise (LRC)
Cruise speed slightly faster than max range, for efficiency.
Flight Planning & Performance: Optimizing Every Flight
Maximum Range Cruise (MRC)
Cruise speed that achieves the greatest distance for fuel consumed.
Flight Planning & Performance: Optimizing Every Flight
Vref Speed
Reference landing approach speed, typically 1.3 times stall speed.
Flight Planning & Performance: Optimizing Every Flight
Aircraft Performance: Takeoff, Climb, Cruise, Landing
HOT-HIGH-HUMID: These three H's always make aircraft performance WORSE. Think 'Heavy, Hot, High, Humid = Harder Performance'.
Flight Planning & Performance: Optimizing Every Flight
Aircraft Performance: Takeoff, Climb, Cruise, Landing
For the ADX exam, pay close attention to questions involving density altitude and its effects on performance. Remember that higher density altitude (hot, high, humid) always degrades performance across all flight phases. Also, memorize the 60% rule for Part 121 dry runway landing distances.
Flight Planning & Performance: Optimizing Every Flight
Aircraft Performance: Takeoff, Climb, Cruise, Landing
Forgetting to account for wind components (headwind/tailwind) when calculating takeoff/landing distances.
Flight Planning & Performance: Optimizing Every Flight
Aircraft Performance: Takeoff, Climb, Cruise, Landing
Not understanding that density altitude, not just field elevation, is the primary factor for performance calculations.
Flight Planning & Performance: Optimizing Every Flight
Aircraft Performance: Takeoff, Climb, Cruise, Landing
Confusing V1 with Vr (rotation speed) or V2 (takeoff safety speed).
Flight Planning & Performance: Optimizing Every Flight
Empty Weight
Aircraft's basic weight, including fixed equipment and unusable fluids.
Flight Planning & Performance: Optimizing Every Flight
Useful Load
Weight available for crew, passengers, cargo, and usable fuel.
Flight Planning & Performance: Optimizing Every Flight
Datum
Imaginary vertical plane from which all horizontal distances are measured.
Flight Planning & Performance: Optimizing Every Flight
Arm
Horizontal distance from the datum to the center of gravity of an item.
Flight Planning & Performance: Optimizing Every Flight
Moment
Product of an item's weight multiplied by its arm.
Flight Planning & Performance: Optimizing Every Flight
Center of Gravity (CG)
Point where the aircraft's total weight is concentrated.
Flight Planning & Performance: Optimizing Every Flight
Load Manifest
Document detailing weight and distribution of passengers, cargo, fuel.
Flight Planning & Performance: Optimizing Every Flight
Zero Fuel Weight
Maximum weight of an aircraft before usable fuel is loaded.
Flight Planning & Performance: Optimizing Every Flight
Weight & Balance Calculations and Limitations
W.A.M. C.G. L.I.M.I.T.S. — Weight, Arm, Moment, Center of Gravity, Limits.
Flight Planning & Performance: Optimizing Every Flight
Weight & Balance Calculations and Limitations
On the ADX exam, be prepared to interpret a loading graph or table to determine if a given weight and CG falls within limits. Keywords to spot include 'maximum takeoff weight,' 'maximum landing weight,' and 'center of gravity envelope.' Remember that an aircraft can be within total weight limits but still out of CG limits.
Flight Planning & Performance: Optimizing Every Flight
Weight & Balance Calculations and Limitations
Forgetting to account for all items of useful load, such as potable water or catering supplies.
Flight Planning & Performance: Optimizing Every Flight
Weight & Balance Calculations and Limitations
Incorrectly calculating moments by using the wrong arm for a specific station.
Flight Planning & Performance: Optimizing Every Flight
Weight & Balance Calculations and Limitations
Failing to check the final calculated CG against the aircraft's specific CG envelope for the given weight.
Flight Planning & Performance: Optimizing Every Flight
Trip Fuel
Fuel needed from departure to destination.
Flight Planning & Performance: Optimizing Every Flight
Reserve Fuel
Regulatory minimum fuel for unforeseen events.
Flight Planning & Performance: Optimizing Every Flight
Contingency Fuel
Extra fuel for anticipated delays/diversions.
Flight Planning & Performance: Optimizing Every Flight
Alternate Airport
Airport specified for landing if destination is unavailable.
Flight Planning & Performance: Optimizing Every Flight
Block Fuel
Total fuel onboard at engine start.
Flight Planning & Performance: Optimizing Every Flight
Taxi Fuel
Fuel consumed during ground operations.
Flight Planning & Performance: Optimizing Every Flight
Jet A/A-1
Kerosene-based aviation turbine fuel.
Flight Planning & Performance: Optimizing Every Flight
Fuel Density
Weight per unit volume of fuel.
Flight Planning & Performance: Optimizing Every Flight
Fuel Planning & Reserve Requirements
Remember 'D-A-R-45' for Domestic fuel: Destination, Alternate, Reserve (45 minutes).
Flight Planning & Performance: Optimizing Every Flight
Fuel Planning & Reserve Requirements
For the ADX exam, memorize the exact Part 121 domestic fuel reserve: enough to fly to the destination, then to the most distant alternate, then for 45 minutes at normal cruising speed.
Flight Planning & Performance: Optimizing Every Flight
Fuel Planning & Reserve Requirements
Forgetting to include the 45-minute reserve when calculating domestic minimum fuel.
Flight Planning & Performance: Optimizing Every Flight
Fuel Planning & Reserve Requirements
Confusing domestic and international fuel reserve requirements.
Flight Planning & Performance: Optimizing Every Flight
Fuel Planning & Reserve Requirements
Underestimating the impact of fuel density on aircraft weight and balance.
Flight Planning & Performance: Optimizing Every Flight
ETOPS
Extended Operations; twin-engine flight beyond one hour from an adequate airport.
Flight Planning & Performance: Optimizing Every Flight
Adequate Airport
An airport suitable for landing, with required services and weather minimums.
Flight Planning & Performance: Optimizing Every Flight
Diversion Time
Maximum time a twin-engine aircraft can fly on one engine to an alternate.
Flight Planning & Performance: Optimizing Every Flight
Preferred Route
Established ATC routes for efficient traffic flow between major airports.
Flight Planning & Performance: Optimizing Every Flight
Random Route
Direct, operator-requested path, often used in less congested airspace.
Flight Planning & Performance: Optimizing Every Flight
Oceanic Tracks
Dynamic, organized routes over oceans, optimized daily for winds.
Flight Planning & Performance: Optimizing Every Flight
Great-Circle Route
Shortest distance between two points on the surface of a sphere.
Flight Planning & Performance: Optimizing Every Flight
Contingency Route
Pre-planned alternative path for use in case of an emergency.
Flight Planning & Performance: Optimizing Every Flight
Route Selection & ETOPS Considerations
ETOPS: Every Twin-Engine Plane Over Seas. Remember, it's about being prepared for a single engine failure far from land!
Flight Planning & Performance: Optimizing Every Flight
Route Selection & ETOPS Considerations
The ADX exam often tests your understanding of ETOPS definitions and requirements. Memorize that ETOPS applies when a twin-engine aircraft is more than one hour (at one-engine-inoperative cruise speed) from an adequate airport.
Flight Planning & Performance: Optimizing Every Flight
Route Selection & ETOPS Considerations
Forgetting to check weather at ETOPS alternate airports for the entire forecast period.
Flight Planning & Performance: Optimizing Every Flight
Route Selection & ETOPS Considerations
Underestimating the impact of strong headwinds on fuel burn and flight time, leading to insufficient fuel planning.
Flight Planning & Performance: Optimizing Every Flight
Route Selection & ETOPS Considerations
Not understanding that ETOPS approval is for the operator and aircraft, not just the route itself.
Flight Planning & Performance: Optimizing Every Flight
VOR
VHF Omnidirectional Range; ground-based radio navigation.
Navigation & ATC: Guiding the Way
NDB
Non-Directional Beacon; low/medium frequency radio navigation.
Navigation & ATC: Guiding the Way
GPS
Global Positioning System; satellite-based navigation system.
Navigation & ATC: Guiding the Way
Radial
A magnetic bearing from a VOR station.
Navigation & ATC: Guiding the Way
ADF
Automatic Direction Finder; aircraft receiver for NDBs.
Navigation & ATC: Guiding the Way
WAAS
Wide Area Augmentation System; enhances GPS accuracy.
Navigation & ATC: Guiding the Way
Line-of-Sight
Radio waves travel in a straight line, limited by horizon.
Navigation & ATC: Guiding the Way
Principles of Air Navigation: VOR, NDB, GPS
VOR: 'VHF Only Radials' – tells you the frequency band and what it provides. NDB: 'Not Directional, But Basic' – reminds you it's less precise but still useful.
Navigation & ATC: Guiding the Way
Principles of Air Navigation: VOR, NDB, GPS
For the ADX exam, memorize the frequency ranges for VOR (108.0-117.95 MHz) and NDB (190-535 kHz). Understand that VORs provide radials FROM the station, while NDBs provide bearing TO the station. Keywords to spot: 'magnetic bearing from' for VOR, 'ADF points to' for NDB, 'satellite constellation' for GPS.
Navigation & ATC: Guiding the Way
Principles of Air Navigation: VOR, NDB, GPS
Confusing VOR radials (from the station) with bearing to an NDB (to the station).
Navigation & ATC: Guiding the Way
Principles of Air Navigation: VOR, NDB, GPS
Underestimating the impact of weather (especially thunderstorms) on NDB and VOR signal reliability.
Navigation & ATC: Guiding the Way
Principles of Air Navigation: VOR, NDB, GPS
Assuming GPS is always available and accurate without considering potential outages or integrity issues like WAAS/LAAS requirements.
Navigation & ATC: Guiding the Way
Controlled Airspace
Airspace where ATC provides separation and services (A, B, C, D, E).
Navigation & ATC: Guiding the Way
Uncontrolled Airspace
Airspace where ATC has no control authority (Class G).
Navigation & ATC: Guiding the Way
Class A Airspace
High altitude, IFR only, 18,000 MSL to FL600.
Navigation & ATC: Guiding the Way
Class B Airspace
Surrounds busiest airports, requires ATC clearance.
Navigation & ATC: Guiding the Way
Class C Airspace
Towered airports, requires two-way radio communication.
Navigation & ATC: Guiding the Way
Class D Airspace
Towered airports, smaller radius, requires two-way radio.
Navigation & ATC: Guiding the Way
Class E Airspace
General controlled airspace, default for IFR operations.
Navigation & ATC: Guiding the Way
Special Use Airspace (SUA)
Areas with activities hazardous to nonparticipating aircraft.
Navigation & ATC: Guiding the Way
Airspace Classification & Chart Interpretation
Alpha, Bravo, Charlie, Delta, Echo, Golf: Alphabetical order helps remember the classes, with 'Golf' being the 'Ground' or uncontrolled layer.
Navigation & ATC: Guiding the Way
Airspace Classification & Chart Interpretation
On the ADX exam, pay close attention to the specific altitude and communication requirements for entering Class B, C, and D airspace. Keywords like 'two-way radio communication established' or 'ATC clearance received' are critical distinctions.
Navigation & ATC: Guiding the Way
Airspace Classification & Chart Interpretation
Entering Class B or C airspace without proper ATC clearance or established two-way radio communication.
Navigation & ATC: Guiding the Way
Airspace Classification & Chart Interpretation
Misinterpreting airspace boundaries or altitudes on aeronautical charts, leading to inadvertent airspace violations.
Navigation & ATC: Guiding the Way
Airspace Classification & Chart Interpretation
Failing to check for active Special Use Airspace (SUA) along a planned route, potentially entering a hazardous area.
Navigation & ATC: Guiding the Way
ARTCC
Air Route Traffic Control Center; controls en route IFR traffic.
Navigation & ATC: Guiding the Way
TRACON
Terminal Radar Approach Control; controls terminal area IFR traffic.
Navigation & ATC: Guiding the Way
ATCT
Air Traffic Control Tower; controls airport surface and vicinity.
Navigation & ATC: Guiding the Way
Clearance
ATC authorization to proceed under specified conditions.
Navigation & ATC: Guiding the Way
Instruction
ATC directive that pilots must follow.
Navigation & ATC: Guiding the Way
Phraseology
Standardized language used in aviation communications.
Navigation & ATC: Guiding the Way
MAYDAY
Distress call indicating immediate threat to life/aircraft.
Navigation & ATC: Guiding the Way
PAN-PAN
Urgency call indicating a serious but not immediate threat.
Navigation & ATC: Guiding the Way
Air Traffic Control Procedures & Communications
To remember the order of ATC facilities from highest to lowest altitude control: 'ART' (ARTCC) is 'TRAP' (TRACON) at the 'TOWER' (ATCT).
Navigation & ATC: Guiding the Way
Air Traffic Control Procedures & Communications
For the ADX exam, memorize the primary function of each ATC facility (ARTCC, TRACON, ATCT) and the correct usage of 'MAYDAY' vs. 'PAN-PAN'. Keywords: 'en route', 'terminal area', 'airport surface', 'distress', 'urgency'.
Navigation & ATC: Guiding the Way
Air Traffic Control Procedures & Communications
Using non-standard phraseology, leading to confusion or misinterpretation by ATC.
Navigation & ATC: Guiding the Way
Air Traffic Control Procedures & Communications
Failing to read back critical clearances (like altitude or heading), which can lead to errors.
Navigation & ATC: Guiding the Way
Air Traffic Control Procedures & Communications
Transmitting without listening first, causing blocked transmissions and missed instructions.
Navigation & ATC: Guiding the Way
Emergency Diversion
Unplanned landing at an alternate airport due to in-flight emergency.
Navigation & ATC: Guiding the Way
ARFF
Aircraft Rescue and Firefighting services at an airport.
Navigation & ATC: Guiding the Way
Suitable Airport
An airport capable of safely accommodating an aircraft during an emergency.
Navigation & ATC: Guiding the Way
Pilot in Command (PIC)
Directly responsible for and is the final authority for the operation of an aircraft.
Navigation & ATC: Guiding the Way
ACARS
Aircraft Communications Addressing and Reporting System.
Navigation & ATC: Guiding the Way
Emergency Procedures & Diversion Planning
EMERGENCY: E-Evaluate, M-Maintain communication, E-Execute, R-Report, G-Ground support, E-Ensure safety, N-Navigate, C-Coordinate, Y-Yield to PIC.
Navigation & ATC: Guiding the Way
Emergency Procedures & Diversion Planning
On the ADX exam, be prepared to identify the primary responsibility for declaring an emergency (Pilot in Command) and the key information a dispatcher provides during a diversion (weather, airport suitability, performance data). Memorize the difference between MAYDAY and PAN-PAN.
Navigation & ATC: Guiding the Way
Emergency Procedures & Diversion Planning
Failing to declare an emergency early enough, delaying critical ATC assistance.
Navigation & ATC: Guiding the Way
Emergency Procedures & Diversion Planning
Not considering all aspects of airport suitability (e.g., runway length, ARFF, medical facilities) for the specific emergency.
Navigation & ATC: Guiding the Way
Emergency Procedures & Diversion Planning
Lack of clear, concise communication between flight crew, ATC, and dispatch.
Navigation & ATC: Guiding the Way