AI.V.D.K1FAA-S-ACS-25 · Nov 2023Knowledge

Elements of safe taxi operations.

ACS element text (the applicant demonstrates understanding of)

Elements of safe taxi operations.

Bottom line

Clear, concise, and effective pilot/controller communication is paramount to safe airport surface operations. You must fully understand and comply with all ATC instructions.

Key numbers

Key numbers for Elements of safe taxi operations.
NumberWhat it means
below 100 feet AGL unless otherwise requested or instructedAir taxi
ATC request needed above 25 feet AGLHover taxi
two levels: 1,200 ft RVR to 500 ft RVR, and below 500 ft RVRLow vis taxi

FAA references

  1. PHAK ch. 14 (p. 14-32) — FAA-H-8083-25C (2023)
  2. AIM 4-3-17 (VFR Helicopter Operations at Controlled Airports) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  3. AIM 4-3-19 (Taxi During Low Visibility) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
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