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AA.II.C.K10FAA-S-ACS-11A · Nov 2023Knowledge

Low visibility taxi operations and techniques used to avoid disorientation.

ACS element text (the applicant demonstrates understanding of)

Low visibility taxi operations and techniques used to avoid disorientation.

Bottom line

Flightcrews should use a “continuous loop” process to actively monitor and update their progress and location during taxi.

Key numbers

Key numbers for Low visibility taxi operations and techniques used to avoid disorientation.
NumberWhat it means
RVR 500 ft (150 m) — below this, SMR or equivalent should be installed and operationalSMR threshold
121.5 — monitor when taxiing or on a runway with an LUAW clearance, if ableGuard freq

FAA references

  1. AC 120-74, paras. 7b, 7c, 7f, 7g — AC No: 120-74B
  2. AC 120-57 ch. 6 Airport Facilities and Services — AC No: 120-57C
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