What is the 123 rule in pilot?

It's called the 3-2-1 rule, and it's the easiest way to remember the regulation. To recap, if the weather at your destination isn't at least 3 SM of visibility and 2000' AGL ceilings from 1 hour before to 1 hour after your ETA, you need to file an alternate.



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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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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, the rule of three or 3:1 rule of descent is that 3 miles of travel should be allowed for every 1,000 feet of descent.

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That's why pilots are taught the 1 in 60 rule, which states that after 60 miles, a one-degree error in heading will result in straying off course by one mile. Which means the lake you planned to fly over could turn out to be a mountain.

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El Paso Intl Airport (KELP) and Biggs Army Airfield (KBIF) are about 0.5 nm apart from each other's property. Their runways are parallel to each other and are about 1.44 nm apart.

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It states that for each degree off (or displacement) over a distance of 60 nautical miles (NM), it will result in 1 NM off course.

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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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