AI.VI.B.K1FAA-S-ACS-25 · Nov 2023Knowledge
The applicant demonstrates instructional knowledge by describing and explaining: Towere...
The applicant demonstrates instructional knowledge by describing and explaining: Towered and nontowered airport operations.
Bottom line
There are two types of airports—towered and nontowered. Pilots operating from a towered airport are required to maintain two-way radio communication with ATC and to acknowledge and comply with their instructions.
Key numbers
| Number | What it means |
|---|---|
| 45 degrees to the downwind leg, joining at midfield (preferred entry from the downwind side) | Pattern entry |
| At least 500 feet above pattern altitude (entry from opposite side) | Midfield crossing |
| 600 feet to 1,500 feet AGL for propeller-driven aircraft at most airports and military air bases | Pattern altitude |
FAA references
- PHAK ch. 14 (p. 14-2) — FAA-H-8083-25C (2023)
- PHAK ch. 14 (p. 14-20) — FAA-H-8083-25C (2023)
- AFH ch. 6 (p. 6-1) — FAA-H-8083-3C
- 14 CFR 91.130 (Operations in Class C airspace.) — eCFR current as of 2026-03-05
- 14 CFR 91.129 (Operations in Class D airspace.) — eCFR current as of 2026-03-05
- 14 CFR 91.127 (Operating on or in the vicinity of an airport in Class E airspace.) — eCFR current as of 2026-03-05
- AIH ch. 1 (p. 1-25) — FAA-H-8083-9B
- AIH ch. 3 (p. 3-16) — FAA-H-8083-9B
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