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IL.II.H — Navigation Systems and Radar Services

IL.II.H for the Flight Instructor Powered Lift ACS: official objective, references, and 14 exact knowledge, risk-management, and skill descriptions.

FAA-S-ACS-27, November 2023. This study page does not replace the current FAA publication or an examiner's plan of action.

Official task context

IL.II.H official ACS context
Certificate or ratingFlight Instructor
Aircraft categoryPowered Lift
Area of operationArea of Operation II. Technical Subject Areas
TaskTask H. Navigation Systems and Radar Services
Task code prefixIL.II.H
Official referencesAC 91-78; AIM; FAA-H-8083-2, FAA-H-8083-9, FAA-H-8083-25
FAA documentFAA-S-ACS-27 — Flight Instructor for Powered-Lift Category Airman Certification Standards
FAA source libraryOpen the official ACS library

Official task objective

To determine the applicant understands navigation systems and radar services, can apply that knowledge, manage associated risks, demonstrate appropriate skills, and provide effective instruction.

What the ACS code means

  • IL identifies the ACS standard family used for this Flight Instructor Powered Lift document.
  • II identifies Technical Subject Areas, the Area of Operation.
  • H identifies Navigation Systems and Radar Services, the Task within that Area.
  • K, R, and S identify knowledge, risk-management, and skill elements. The number selects the item; a trailing lowercase letter identifies a listed sub-element.

Knowledge elements

Official ACS knowledge items and mock-oral treatment
ACS codeOfficial descriptionHow a mock oral can probe it
IL.II.H.K1Ground-based navigation (identification, orientation, course determination, equipment, tests, regulations, interference, appropriate use of navigation data, and signal integrity).Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
IL.II.H.K2Satellite-based navigation (e.g., equipment, regulations, authorized use of databases, and Receiver Autonomous Integrity Monitoring (RAIM)).Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
IL.II.H.K3Radar assistance to visual flight rules (VFR) aircraft (e.g., operations, equipment, available services, traffic advisories).Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.
IL.II.H.K4Transponder (Mode(s) A, C, and S) and Automatic Dependent Surveillance-Broadcast (ADS-B).Explain the element, apply it to a scenario, and connect the answer to current references or aircraft information when relevant.

Risk management elements

Official ACS risk management items and mock-oral treatment
ACS codeOfficial descriptionHow a mock oral can probe it
IL.II.H.R1Management of automated navigation and autoflight systems.Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision.
IL.II.H.R2Distractions, task prioritization, loss of situational awareness, or disorientation.Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision.
IL.II.H.R3Limitations of the navigation system in use.Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision.
IL.II.H.R4Loss of a navigation signal.Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision.
IL.II.H.R5Use of an electronic flight bag (EFB), if used.Work through a scenario by identifying the hazard, evaluating the risk, and explaining a practical mitigation or decision.

Skills elements

Official ACS skills items and mock-oral treatment
ACS codeOfficial descriptionHow a mock oral can probe it
IL.II.H.S1Use an airborne electronic navigation system.Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test.
IL.II.H.S2Determine the aircraft's position using the navigation system.Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test.
IL.II.H.S3Intercept and track a given course, radial, or bearing.Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test.
IL.II.H.S4Recognize and describe the indication of station or waypoint passage.Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test.
IL.II.H.S5Use proper communication procedures when utilizing radar services.Describe the procedure, interpretation, or decision process that can be discussed during an oral. Physical aircraft performance remains part of the practical test.

Difficulty data

Difficulty calibration is ongoing for this Task. A difficulty estimate is published only with a sufficiently large, privacy-preserving first directly recorded assessment sample. Any observed difficulty comes from Checkride AI mock-oral practice assessments and is a practice-data proxy, not an FAA practical-test pass or fail rate.

Difficulty calibration remains ongoing until an item clears the private reporting threshold. Percentages, when available, describe the share who needed review on their first directly recorded assessment. Underlying sample sizes are never published, and historical final states are not backfilled into this measure.

How to use this in a mock oral

A mock examiner can ask you to explain the published elements, apply them to the configured aircraft and airport scenario, identify risks, and defend a decision. The prompts are practice scenarios; they are not claimed to be actual FAA examiner scripts or a prediction of the questions you will receive.

Practice in a mock oral

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