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AI.II.I.R5FAA-S-ACS-25 · Nov 2023Risk management

Limitations of air traffic control (ATC) services.

ACS element text (the applicant demonstrates understanding of)

Limitations of air traffic control (ATC) services.

Bottom line

ATC Delays and Service Availability–The ATC system may require route changes or holding, which may require more fuel than expected. Air traffic control can assist pilots with traffic avoidance, weather avoidance, terrain avoidance, and navigation.

FAA references

  1. PHAK ch. 15 (p. 15-7) — FAA-H-8083-25C (2023)
  2. PHAK ch. 14 (p. 14-24) — FAA-H-8083-25C (2023)
  3. RMH ch. 3 (p. 3-8) — FAA-H-8083-2A
  4. 14 CFR 91.123 (Compliance with ATC clearances and instructions.) — eCFR current as of 2026-03-05
  5. AIM 5-5-15 (Minimum Fuel Advisory) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
  6. RMH ch. 6 (pp. 6-3–6-4) — FAA-H-8083-2A
  7. PHAK ch. 16 (p. 16-34) — FAA-H-8083-25C (2023)
  8. AIH ch. 1 (p. 1-25) — FAA-H-8083-9B
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