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depicted on aeronautical charts.
3-4-3. Restricted Areas
a. Restricted areas contain airspace identified by
an area on the surface of the earth within which the
flight of aircraft, while not wholly prohibited, is
subject to restrictions. Activities within these areas
must be confined because of their nature or
limitations imposed upon aircraft operations that are
not a part of those activities or both. Restricted areas
denote the existence of unusual, often invisible,
hazards to aircraft such as artillery firing, aerial
gunnery, or guided missiles. Penetration of restricted
areas without authorization from the using or
controlling agency may be extremely hazardous to
the aircraft and its occupants. Restricted areas are
published in the Federal Register and constitute
14CFR Part 73.
b. ATC facilities apply the following procedures
when aircraft are operating on an IFR clearance
(including those cleared by ATC to maintain
VFR‐on‐top) via a route which lies within joint‐use
restricted airspace.
1. If the restricted area is not active and has been
released to the controlling agency (FAA), the ATC
facility will allow the aircraft to operate in the
restricted airspace without issuing specific clearance
for it to do so.
2. If the restricted area is active and has not been
released to the controlling agency (FAA), the ATC
facility will issue a clearance which will ensure the
aircraft avoids the restricted airspace unless it is on an
approved altitude reservation mission or has obtained
its own permission to operate in the airspace and so
informs the controlling facility.
NOTEThe
above apply only to joint‐use restricted airspace and
not to prohibited and nonjoint‐use airspace. For the latter
categories, the ATC facility will issue a clearance so the
aircraft will avoid the restricted airspace unless it is on an
approved altitude reservation mission or has obtained its
own permission to operate in the airspace and so informs
the controlling facility.
c. Restricted airspace is depicted on the en route
chart appropriate for use at the altitude or flight level
being flown. For joint‐use restricted areas, the name
of the controlling agency is shown on these charts.
For all prohibited areas and nonjoint‐use restricted
areas, unless otherwise requested by the using
agency, the phrase “NO A/G” is shown.
3-4-4. Warning Areas
A warning area is airspace of defined dimensions,
extending from three nautical miles outward from the
coast of the U.S., that contains activity that may be
hazardous to nonparticipating aircraft. The purpose
of such warning areas is to warn nonparticipating
pilots of the potential danger. A warning area may be
located over domestic or international waters or both.
AIM 2/14/08
3-4-2 Special Use Airspace
3-4-5. Military Operations Areas
a. MOAs consist of airspace of defined vertical
and lateral limits established for the purpose of
separating certain military training activities from
IFR traffic. Whenever a MOA is being used,
nonparticipating IFR traffic may be cleared through
a MOA if IFR separation can be provided by ATC.
Otherwise, ATC will reroute or restrict nonparticipating
IFR traffic.
b. Examples of activities conducted in MOAs
include, but are not limited to: air combat tactics, air
intercepts, aerobatics, formation training, and
low-altitude tactics. Military pilots flying in an active
MOA are exempted from the provisions of 14 CFR
Section 91.303(c) and (d) which prohibits aerobatic
flight within Class D and Class E surface areas, and
within Federal airways. Additionally, the Department
of Defense has been issued an authorization to
operate aircraft at indicated airspeeds in excess of
250knots below 10,000 feet MSL within active
MOAs.
c. Pilots operating under VFR should exercise
extreme caution while flying within a MOA when
military activity is being conducted. The activity
status (active/inactive) of MOAs may change
frequently. Therefore, pilots should contact any FSS
within 100 miles of the area to obtain accurate
real‐time information concerning the MOA hours of
operation. Prior to entering an active MOA, pilots
should contact the controlling agency for traffic
advisories.
d. MOAs are depicted on sectional, VFR Terminal
Area, and Enroute Low Altitude charts.
3-4-6. Alert Areas
Alert areas are depicted on aeronautical charts to
inform nonparticipating pilots of areas that may
contain a high volume of pilot training or an unusual
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