CA.III.A.K6FAA-S-ACS-7B · Nov 2023Knowledge
Equipment issues that could cause loss of communication.
Equipment issues that could cause loss of communication.
Bottom line
For a flight in IMC, having only one radio could be considered an aircraft hazard. On a day VFR flight in Class E airspace, having only a single navigation/communication radio is not a major concern.
Key numbers
| Number | What it means |
|---|---|
| 118.0 MHz to 136.975 MHz | VHF band |
| One spare set of fuses, or three spare fuses of each kind required, accessible to the pilot in flight, for VFR flight at night | Night VFR fuses |
| More than 30 minutes flying time or 100 nautical miles from the nearest shore | Overwater trigger |
FAA references
- RMH ch. 3 (pp. 3-6–3-7) — FAA-H-8083-2A
- 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. 14 (p. 14-22) — FAA-H-8083-25C (2023)
- 14 CFR 91.205 (Powered civil aircraft with standard U.S. airworthiness certificates: Instrument and equipment requirements.) — eCFR current as of 2026-03-05
- 14 CFR 91.511 (Communication and navigation equipment for overwater operations.) — eCFR current as of 2026-03-05
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