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Chapter 24. Warning Areas
Section 1. General
24-1-1. DEFINITION
A warning area is airspace of defined dimensions,
(extending from 3 NM outward from the coast of the
United States), designated to contain activity that
may be hazardous to nonparticipating aircraft.
24-1-2. PURPOSE
The purpose of a warning area is to warn
nonparticipating pilots of the potential danger from
activities being conducted. A warning area may be
located over domestic waters, international waters,
or both.
24-1-3. IDENTIFICATION
Identify warning areas with the letter "W" prefix
followed by a dash; a two- or three-digit number; a
location; and the two-letter state abbreviation (e.g.,
W-291, San Diego, CA). A letter suffix is used to
indicate subdivisions. Identification numbers are
assigned by Airspace and Rules.
24-1-4. JOINT USE
Warning areas may be considered for joint use if the
area can be released to the FAA during periods when
it is not required for its designated purpose, and
provided the warning area is located in airspace
wherein the FAA exercises ATC authority under
ICAO agreements. When designating a warning area
for joint use, a letter of agreement shall be executed
between the controlling and using agencies to define
the conditions and procedures under which the
controlling agency may authorize nonparticipating
aircraft to transit, or operate within the area. Apply
the provisions of paragraph
23-1-5, as
appropriate.
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