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AI.V.E.S3FAA-S-ACS-25 · Nov 2023Skills

Comply with seaplane base/airport/taxiway markings, signals, and signs.

ACS element text (the applicant demonstrates understanding of)

Comply with seaplane base/airport/taxiway markings, signals, and signs.

Bottom line

There are markings and signs used at airports that provide directions and assist pilots in airport operations. At a towered airport, runway hold markings should never be crossed without explicit ATC instructions.

FAA references

  1. AC 91-73, para. 7d — AC No: 91-73B
  2. PHAK ch. 14 (p. 14-33) — FAA-H-8083-25C (2023)
  3. PHAK ch. 14 (p. 14-5) — FAA-H-8083-25C (2023)
  4. AIM 4-3-18 (Taxiing) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  5. AIM 2-3-4 (Taxiway Markings) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  6. AC 91-73, para. 7g — AC No: 91-73B
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