What are IFR alternate minimums?

If either the ceiling or visibility is forecast to be less than 2,000 feet or 3 statute miles during that arrival window, you are required to file an alternate. Also, the destination airport must have at least one instrument approach procedure or an alternate airport will always be required.



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In theory, a pilot can operate in sub-VMC conditions under IFR without an ATC clearance in Class G airspace. However, to enter or operate in controlled airspace under IFR, an ATC clearance is required.

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There's no takeoff clearance needed without a tower, but until you get the OK, the release, from approach, you can't depart IFR. So you'll then readback that clearance and they'll say “Cessna 9334H readback correct advise ready for departure.” And they may ask you which runway you're going to depart from.

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A ceiling of at least 600 feet and a visibility of two statute miles if the airport has a precision approach (ILS Approach) A ceiling of at least 800 feet and a visibility of two statute miles if the airport has a non-precision approach (RNAV/GPS or VOR)

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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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VFR cruising altitude rules in the US and Canada On a magnetic course of 0-179 degrees shall fly at an odd thousand ft MSL altitude +500 feet (e.g., 3,500, 5,500, or 7,500 ft); or. On a magnetic course of 180-359 degrees shall fly at an even thousand ft MSL altitude +500 feet (e.g., 4,500, 6,500, or 8,500 ft).

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Why Do Pilots Prefer IFR Over VFR? IFR provides pilots with greater flexibility when it comes to controlled airspace, weather conditions, and career opportunities.

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IFR flying is astronomically more challenging than VFR flying, but those pilots who achieve this distinction are invariably more equipped to fly IFR and VFR. Aviating under IFR, a pilot is authorized to fly into clouds in what is called zero visibility. All of the VFR-pilot privileges also apply.

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If there is any question of weather, you can (and should) retain your IFR clearance until on the ground and then cancel. However, there may be good reasons to cancel depending upon circumstances. For example somebody may be following you and cannot be cleared for the approach until you cancel your IFR clearance.

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The 40:1 obstacle identification surface (OIS) begins at the departure end of runway (DER) and slopes upward at 152 FPNM until reaching the minimum IFR altitude or entering the en route structure.

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