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It is certain that such weather phenomena like flat light and white out have
existed since the beginning of time. However, to date, no real in-depth studies
into these weather conditions have been examined extensively as they relate to
the aviation community. The Federal Aviation Administration continues to
explore this unusual visual condition and in the interest of safety is committed
to reporting any new findings.
Our senses do not deceive us. This is not because they always
judge correctly, but because they do not judge at all.
Immanuel Kant
To help maintain high safety standards, the FAA has created this pamphlet and
a video entitled, "Flying in Flat Light & White Out Conditions."
This pamphlet is intended to provide a reference guide to supplement the video and
any formal training you may receive. It is generic in nature and can be used with
FAA Advisory Circular 60-4A. 14 CFR Section 91.157 addresses special VFR weather
minimums, indicating particular exceptions for helicopters, including how to equip
the aircraft with proper operative equipment. There are multitudes of resources
that can be accessed prior to flight when planning to travel into areas where flat
light and white out are possibilities. Such resources include: local fixed-based
operators; FAA Flight Service Stations; aviation associations, and pilots who are
located in the area where you intend to travel.
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