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AIM

10/12/17

3

−3−1

Class G Airspace

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,
Class B, 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 14 CFR 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.)