Section 3. Class G Airspace


3-3-1. General

Class G airspace (uncontrolled) is that portion of the 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 3-3-1.)

3-3-3. IFR Requirements

a. The CFR's specify 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 and Flight Levels. (See TBL 3-3-1.)

TBL 3-3-1

IFR Altitudes and Flight Levels
Class G Airspace

If your magnetic course (ground track) is:

And you are below
18,000 feet MSL, fly:

And you are at or above 18,000 feet MSL but below FL 290, fly:

And you are at or above FL 290, fly 4,000 foot intervals:

0°to 179°

Odd thousands MSL, (3,000; 5,000; 7,000, etc.)

Odd Flight Levels
(FL 190; 210; 230, etc.)

Beginning at FL 290;
(FL 290; 330; 370, etc.)

180° to 359°

Even thousands MSL, (2,000; 4,000; 6,000, etc.)

Even Flight Levels
(FL 180; 200; 220, etc.)

Beginning at FL 310;
(FL 310; 350; 390, etc.)