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AI.VII.H.R4FAA-S-ACS-25 · Nov 2023Risk management

Collision hazards.

ACS element text (the applicant demonstrates understanding of)

Collision hazards.

Bottom line

Airways, especially near VORs, and Class B, Class C, Class D, and Class E surface areas are places where aircraft tend to cluster. Any aircraft that appears to have no relative motion and stays in one scan quadrant is likely to be on a collision course. Proper clearing procedures, combined with proper visual scanning techniques, are the most effective strategy for collision avoidance.

FAA references

  1. PHAK ch. 2 (p. 2-24) — FAA-H-8083-25C (2023)
  2. AIM 8-1-8 (Judgment Aspects of Collision Avoidance) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  3. AFH ch. 1 (pp. 1-11–1-12) — FAA-H-8083-3C
  4. SEA ch. 6 (p. 6-8) — FAA-H-8083-23
  5. AIM 4-3-24 (Use of Aircraft Lights) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  6. PHAK ch. 14 (p. 14-28) — FAA-H-8083-25C (2023)
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