2/14/08 AIM
Class G Airspace 3-3-1
Section 3. Class G Airspace
3-3-1. General
Class G airspace (uncontrolled) is that portion of
airspace that has not been designated as Class A,
ClassB, Class C, Class D, or Class E airspace.
3-3-2. VFR Requirements
Rules governing VFR flight have been adopted to
assist the pilot in meeting the responsibility to see and
avoid other aircraft. Minimum flight visibility and
distance from clouds required for VFR flight are
contained in 14CFR Section 91.155.
(See TBL 3-1-1.)
3-3-3. IFR Requirements
a. Title 14 CFR specifies the pilot and aircraft
equipment requirements for IFR flight. Pilots are
reminded that in addition to altitude or flight level
requirements, 14 CFR Section 91.177 includes a
requirement to remain at least 1,000 feet (2,000 feet
in designated mountainous terrain) above the highest
obstacle within a horizontal distance of 4 nautical
miles from the course to be flown.
b. IFR Altitudes.
(See TBL 3-3-1.)
TBL 3-3-1
IFR Altitudes
Class G Airspace
If your magnetic course
(ground track) is:
And you are below
18,000 feet MSL, fly:
0 to 179 Odd thousands MSL, (3,000; 5,000; 7,000, etc.)
180 to 359 Even thousands MSL, (2,000; 4,000; 6,000, etc.)
2/14/08 AIM
Special Use Airspace 3-4-1
Section 4. Special Use Airspace
3-4-1. General
a. Special use airspace consists of that airspace
wherein activities must be confined because of their
nature, or wherein limitations are imposed upon
aircraft operations that are not a part of those
activities, or both. Except for controlled firing areas,
special use airspace areas are depicted on aeronautical
charts.
b. Prohibited and restricted areas are regulatory
special use airspace and are established in 14 CFR
Part73 through the rulemaking process.
c. Warning areas, military operations areas
(MOAs), alert areas, and controlled firing areas
(CFAs) are nonregulatory special use airspace.
d. Special use airspace descriptions (except CFAs)
are contained in FAA Order JO 7400.8, Special Use
Airspace.
e. Special use airspace (except CFAs) are charted
on IFR or visual charts and include the hours of
operation, altitudes, and the controlling agency.
3-4-2. Prohibited Areas
Prohibited areas contain airspace of defined
dimensions identified by an area on the surface of the
earth within which the flight of aircraft is prohibited.
Such areas are established for security or other
reasons associated with the national welfare. These
areas are published in the Federal Register and are
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