***Link*** :: [§ 91.177 Minimum altitudes for IFR operations.](https://www.ecfr.gov/current/title-14/section-91.177) ***Description*** :: `= this.link` ***Author*** :: [[FAA]] ***Key Quotes***: * Except when necessary for takeoff or landing... no person may operate an aircraft under IFR below * The applicable minimum altitudes prescribed in parts [[Part 95|95]] and [[Part 97|97]] of this chapter.... * If no applicable minimum altitude is prescribed... * In [[Designated Mountainous Areas|mountainous areas]]: 2,000 feet above the highest obstacle within a horizontal distance of 4 nautical miles from the course to be flown * In non-mountainous areas: an altitude of 1,000 feet above the highest obstacle within a horizontal distance of 4 nautical miles from the course to be flown * Climb to a higher minimum IFR altitude shall begin immediately after passing the point beyond which that minimum altitude applies, except... #source #far