What is the minimum altitude for IFR?

§ 91.177 Minimum altitudes for IFR operations. (ii) In any other case, an altitude of 1,000 feet above the highest obstacle within a horizontal distance of 4 nautical miles from the course to be flown.



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To get your instrument rating, you must satisfy the following requirements:
  • Hold at least a private pilot certificate.
  • Be able to speak English.
  • Take a ground school training course or receive ground training from an authorized instructor.
  • Receive a logbook endorsement certifying you are prepared for the FAA knowledge test.


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The VFR Cruising Altitude rule does not apply below 3,000 feet AGL. There are some altitudes, however, that pilots seem to choose for level flight. Close to sea level they are 1000, 1500, 2000 and 2500. They are easy to read and remember on an altimeter.

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Instrument Procedures Handbook An off-route obstruction clearance altitude (OROCA) is an off-route altitude that provides obstruction clearance with a 1,000-foot buffer in non- mountainous terrain areas and a 2,000-foot buffer in designated mountainous areas within the United States.

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Standard takeoff minima are one statute mile for aircraft having two engines or less and one-half statute mile for aircraft having more than two engines. Specified ceiling and visibility minima will allow visual avoidance of obstacles during the initial climb at the standard climb gradient.

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Let's say the weather at your airport is IFR but clear a few miles away. While the VFR-only pilot will have to wait for the weather to improve, the IFR pilot can depart on an IFR flight plan, then cancel the IFR flight plan when they are in VFR conditions.

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If a usable precision approach is available: 600' ceilings AND 2 SM of visibility. If only a non-precision approach is useable: 800' AND 2 SM of visibility. If no instrument approaches are available: Descent from the MEA and landing must be conducted under basic VFR.

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The 1 - 3 - 6 Rule for IFR Flight Planning. predominant weather at your ETA through 1 hour after ETA must be equal to or greater than the military weather planning minimums for the approach you intend to fly at that destination.

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Definition: The 5/20 rule is a norm of the Indian Aviation Ministry under which national carriers are required to have five years of operational experience and a fleet of minimum 20 aircraft to fly overseas. This is applicable to all commercial aviation organisations flying passengers.

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In aviation medicine, the 1% rule is a risk threshold that is applied to the medical fitness of pilots. The 1% rule states that a 1% per annum risk (See also risk management) of medical incapacitation is the threshold between acceptable and unacceptable.

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The Federal Aviation Administration (FAA) requires two pilots at all times for most aircraft that exceed 12,500 pounds. Other factors, such as flight length may also demand more than one pilot. One of the biggest reasons two pilots are required for commercial flights and private jets is safety.

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