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AIM 3-3-3
AIM AIM 3-3-3

IFR Requirements

Chapter 3 · Section 3. Class G Airspace

(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.)

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