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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.)