AIM ¶ 1-1-12 — NAVAIDs With Voice
AIM 1-1-12 explains voice-equipped en route NAVAIDs, FSS/approach control, Chart Supplement listings, and hours of operation for pilot checkride prep.
AIM 1-1-12 explains how some en route navigation aids (like VORs) are equipped with two-way voice communication capability, allowing pilots to talk through the NAVAID frequency.
Key points to remember:
- Voice-equipped en route NAVAIDs are operationally controlled by either a Flight Service Station (FSS) or an approach control facility.
- Facilities with two-way voice are identified in the Chart Supplement and on aeronautical charts.
- Unless the chart notes otherwise, all radio navigation aids operate continuously, except during scheduled maintenance shutdowns.
- If a NAVAID has limited hours of operation, those hours are annotated on charts and in the Chart Supplement.
Why this matters operationally: when you lose radio contact, are flying in remote areas, or need to coordinate with ATC/FSS, knowing you can transmit through a VOR's voice feature is a valuable backup. Always verify NAVAID availability and hours during preflight planning — relying on an out-of-service NAVAID could compromise your flight.
Five FAA-written-style questions. Instant explanations, every answer cites its source — no account needed.
You are flying VFR in Class E airspace at 8,500 feet MSL during the day. What are your minimum visibility and cloud clearance requirements?