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AI.VI.B.S4FAA-S-ACS-25 · Nov 2023Skills

Maintain orientation with the runway/landing area in use.

ACS element text (the applicant demonstrates understanding of)

Maintain orientation with the runway/landing area in use.

Bottom line

A tetrahedron is installed to indicate the direction of landings and takeoffs when conditions at the airport warrant its use. The small end of the tetrahedron points in the direction of landing.

FAA references

  1. PHAK ch. 14 (p. 14-20) — FAA-H-8083-25C (2023)
  2. AIM 4-3-3 (Traffic Patterns) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  3. 14 CFR 91.113 (Right-of-way rules: Except water operations.) — eCFR current as of 2026-03-05
  4. PHAK ch. 14 (p. 14-28) — FAA-H-8083-25C (2023)
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