FlyCurrentFLYCURRENT
CA.IV.H.R4FAA-S-ACS-7B · Nov 2023Risk management

Collision hazards.

ACS element text (the applicant demonstrates understanding of)

Collision hazards.

Bottom line

If the other aircraft shows no lateral or vertical motion, but is increasing in size, the observing pilot needs to take immediate evasive action to avoid a collision. Proper clearing procedures, combined with proper visual scanning techniques, are the most effective strategy for collision avoidance.

FAA references

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

Build understanding you can use

Unlock the full lesson and continue studying this element.

  • Full teaching sections: How it shows up; Decision rules; Mitigations; The hazard; How it shows up
  • Check your understanding with answers you can reveal
View membership options