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AIM — FAA OPERATIONAL GUIDANCE

7-1-17 Estimating Intensity of Snow or Drizzle (Based on Visibility)

AIM Chapter 7. Safety of Flight — Section 7-1, Meteorology

Official text — AIM 7-1-17

AIM — FAA OPERATIONAL GUIDANCE

a. Light. Visibility more than 1/2 statute mile.

b. Moderate. Visibility from more than 1/4 statute mile to 1/2 statute mile.

c. Heavy. Visibility 1/4 statute mile or less.

Reproduced from the FAA Aeronautical Information Manual (Basic (with Change 3)). The AIM is FAA guidance, not regulation. Verify against the official source before relying on it operationally.

Is this a regulation?

No — this is FAA guidance, not a regulation.

Aeronautical Information Manual. FAA operational guidance and recommended practices. The AIM is not regulatory, although it often explains how to comply with regulations.

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