# HI.II.I — Navigation Systems and Radar Services — Flight Instructor Rotorcraft ACS

> HI.II.I from FAA-S-ACS-29, including the official objective, references, notes, and 14 exact knowledge, risk-management, and skill descriptions.

Canonical HTML: [https://www.check-ride.ai/acs/rotorcraft/flight-instructor/hi-ii-i](https://www.check-ride.ai/acs/rotorcraft/flight-instructor/hi-ii-i)

Site reference: [https://www.check-ride.ai/llms.txt](https://www.check-ride.ai/llms.txt)

## Official Task context

- FAA document: Flight Instructor for Rotorcraft Category Helicopter Rating Airman Certification Standards
- Identifier: FAA-S-ACS-29
- Published source date: November 2023
- Aircraft category: Rotorcraft
- Certificate or rating: Flight Instructor
- Area of Operation: Area of Operation II. Technical Subject Areas
- Task: Task I. Navigation Systems and Radar Services
- Task code prefix: HI.II.I
- Official references: AC 91-78; AIM; FAA-H-8083-2, FAA-H-8083-4, FAA-H-8083-9, FAA-H-8083-21, FAA-H-8083-25
- FAA source library: https://www.faa.gov/training_testing/testing/acs

## 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.

## Knowledge elements

- **HI.II.I.K1** — Ground-based navigation (identification, orientation, course determination, equipment, tests, regulations, interference, appropriate use of navigation data, and signal integrity).
- **HI.II.I.K2** — Satellite-based navigation (e.g., equipment, regulations, authorized use of databases, and Receiver Autonomous Integrity Monitoring (RAIM)).
- **HI.II.I.K3** — Radar assistance to visual flight rules (VFR) aircraft (e.g., operations, equipment, available services, traffic advisories).
- **HI.II.I.K4** — Transponder (Mode(s) A, C, and S) and Automatic Dependent Surveillance-Broadcast (ADS-B).

## Risk management elements

- **HI.II.I.R1** — Management of automated navigation and autoflight systems.
- **HI.II.I.R2** — Distractions, task prioritization, loss of situational awareness, or disorientation.
- **HI.II.I.R3** — Limitations of the navigation system in use.
- **HI.II.I.R4** — Loss of a navigation signal.
- **HI.II.I.R5** — Use of an electronic flight bag (EFB), if used.

## Skills elements

- **HI.II.I.S1** — Use an airborne electronic navigation system.
- **HI.II.I.S2** — Determine the aircraft's position using the navigation system.
- **HI.II.I.S3** — Intercept and track a given course, radial, or bearing.
- **HI.II.I.S4** — Recognize and describe the indication of station or waypoint passage.
- **HI.II.I.S5** — Use proper communication procedures when utilizing radar services.

## Difficulty methodology

Difficulty calibration is ongoing for this Task. Observed difficulty is a privacy-thresholded check-ride.ai mock-oral practice proxy, not an FAA practical-test pass or fail rate. Underlying sample sizes and the private reporting threshold are not published.

## Use in practice

A mock examiner can ask a pilot to explain the published elements, apply them to the configured aircraft and airport context, identify risks, and defend a decision. Practice prompts are not represented as actual FAA examiner scripts or predictions of the questions a candidate will receive.