PA.VI.B.S1FAA-S-ACS-6C · Nov 2023Skills
Use an airborne electronic navigation system.
Use an airborne electronic navigation system.
Bottom line
VOR receivers are designed with an alarm flag to indicate when signal strength is inadequate to operate the navigational equipment. GPS derived altitude should not be relied upon to determine aircraft altitude since the vertical error can be quite large and no integrity is provided.
FAA references
- PHAK ch. 16 (p. 16-23) — FAA-H-8083-25C (2023)
- AIM 1-2-4 (Recognizing, Mitigating, and Adapting to GPS Jamming and/or Spoofing) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
- PHAK ch. 16 (p. 16-31) — FAA-H-8083-25C (2023)
- AIM 1-1-13 (User Reports Requested on NAVAID Outages) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
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