PA.VIII.F.HOW· Procedure
How to manage comm, nav, and ATC
How to manage comm, nav, and ATC services under instruments: setup, scan-protect, communicate, navigate
VIII.F evaluates how the pilot maintains the instrument scan while simultaneously communicating with ATC and using radio navigation aids (GPS, VOR). The maneuver simulates the most common real-world VFR-into-IMC scenario — the pilot has lost visual reference and is asking ATC for help while flying solely by instruments. The skill is workload management: the scan can't drop while the radio is in use.
The scan is the priority. If the choice is between completing a radio transmission and maintaining the scan, the scan wins. ATC will repeat themselves; the airplane won't recover its own altitude.
Setup
- Begin from a stable straight-and-level (VIII.A baseline).
- Brief the simulated scenario: what's the current heading, altitude, position? What's the target (destination, alternate)?
- Verify radio setup: frequencies pre-loaded if possible (active + standby), GPS active waypoint correct, VOR tuned and identified.
- Pre-brief radio calls mentally if heavy comm is expected — knowing what you're going to say reduces in-flight cognitive load.
Protect the scan during comm
The scan is the default state. Comm tasks insert without replacing it.
While the radio is in use:
- Glance at the AI before keying the mic — confirm attitude is stable.
- Transmit in a short, scripted format.
- Return to the scan immediately — AI, primary instruments cycle.
- Listen for the response while continuing the scan.
The temptation is to focus on the radio call until it's complete; this drops the scan for 5–15 seconds. The discipline: the scan continues during transmissions.
Communicate effectively
ATC communication under instruments follows the standard format:
- Whom you're calling (e.g., "Center" or "Approach").
- Who you are (callsign).
- Where you are (position).
- What you want (request).
Example: "Approach, Cessna 12345, 10 miles south, 3,000 feet, requesting flight following."
For unusual situations (VFR-into-IMC):
- Declare the situation: "Cessna 12345, VFR-into-IMC, request vectors to VMC."
- Listen carefully to vectors and altitude assignments.
- Read back assignments.
Use navigation effectively
GPS and VOR provide situational awareness — current position, distance to next fix, course guidance.
Under hood:
- GPS use is typically through the moving map and active flight plan. Glance to confirm position, track, distance, ETA.
- VOR use requires identifying the station (Morse code), setting the course, tracking the CDI.
- Automation (autopilot, if equipped) reduces cockpit workload during comm — but only if the pilot trusts and verifies the automation's behavior.
The maneuver tests effective use of these tools while the scan continues. A pilot who fumbles with the GPS for 30 seconds while losing altitude has failed the scan-protection standard even if the GPS interaction is successful.
Demonstrate the integrated skill
VIII.F.S2 specifies "effective use of automation while maintaining instrument scan." The integrated skill is:
- Initiate the comm or nav task with a stable airplane.
- Execute the task in short, brisk increments.
- Return to the scan between increments.
- Verify the task completion + airplane status periodically.
Example: setting up a new GPS waypoint:
- Scan check (AI, altimeter, ASI, HI) → stable.
- 2 seconds of GPS interaction → enter the waypoint identifier letter.
- Scan check → stable.
- 2 seconds of GPS interaction → next letter.
- Scan check → stable.
- ...
Better to take 30 seconds with five scan checks than 10 seconds without any. The standard is the maintenance of flight, not the speed of the secondary task.
Common pitfall: heads-down on automation. The GPS or autopilot interface is engaging — touch screens, menus, confirmation prompts. A pilot who's deep in the menu for 20 seconds may have the airplane drifting outside tolerances when they look up. Cycle the scan; don't extend the menu interaction without scan checks.
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PA.VIII.F.TOL · ACS tolerances
The Private Pilot Airplane ACS (FAA-S-ACS-6C, effective May 31, 2024) anchors VIII.F tolerances around effective communication and navigation under simulated…