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What is the 0123 rule for IFR?

1 hour before to 1 hour after your ETA (at the listed destination), the ceiling will be at least 2,000' AGL, and the visibility will be at least 3 SM. It's called the 1-2-3 rule; this is the easiest way to remember this section.



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IFR means a ceiling less than 1,000 feet AGL and/or visibility less than three miles. Low IFR (LIFR) is a sub-category of IFR. VFR means a ceiling greater than 3,000 feet AGL and visibility greater than five miles.

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Many pilots refer to this as the 1-2-3 rule: Plus or minus 1 hour from arrival, ceilings at least 2,000 feet and visibility at least 3 statute miles.

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In aviation, the rule of three or 3:1 rule of descent is a rule of thumb that 3 nautical miles (5.6 km) of travel should be allowed for every 1,000 feet (300 m) of descent. For example, a descent from flight level 350 would require approximately 35x3=105 nautical miles.

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This does not mean you cannot file IFR to such an airport, but there are some restrictions. First, any time you file IFR to an airport without a published approach, you must file an alternate, no matter how good the weather is forecast to be at the planned destination.

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§ 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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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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Where Do Private Planes Land? Private planes, also known as private aircraft or private jets, are allowed to land at both commercial and general aviation airports. First of all, it's important to understand that there are different types of airports.

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IFR flying provides certain protections which are not readily available to those flying under VFR. Even if you never fly into a cloud, having an IFR-equipped airplane and pilot will make for a safer and confident journey. Flying through and above the clouds provides for safer travels.

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An altitude of 500 feet above the surface, except over open water or sparsely populated areas. In those cases, the aircraft may not be operated closer than 500 feet to any person, vessel, vehicle, or structure.

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As part of the testing of a new aircraft, the manufacturer must demonstrate that all passengers can be evacuated in a short amount of time when an emergency arises - within 90 seconds to be precise. If it doesn't comply, the aviation authorities won't approve its safety certification.

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