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What is 121 takeoff minimum?

Commercial Part 121/135 operators have the following standard takeoff minimums: One and two engines: one-mile visibility (1 mile) Three or more engines: one-half mile visibility (1/2 mile)



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Commercial Part 121/135 operators (and sometimes Part 91) have the following standard takeoff minimums:
  • One and two engines: one-mile visibility (1 mile)
  • Three or more engines: one-half mile visibility (1/2 mile)


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(1) For day operations—1,000-foot ceiling and one-mile visibility. (2) For night operations—1,000-foot ceiling and two-mile visibility.

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The lowest routinely used takeoff visibility minimum is 600 feet RVR, which is about one-tenth of a mile. Pretty low. It's the lowest visibility typically used in simulator training for taxi and takeoff practice.

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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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14 CFR Part 121 permits landing or takeoff by domestic scheduled air carriers where a local surface restriction to visibility is not less than 1/2 statute mile, provided all turns after takeoff or before landing and all flights beyond 1 statute mile from the airport boundary can be accomplished above or outside the ...

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The Part 135 operators are the best safety-wise. The pilots are required to have a minimum of 500 total flight hours, 100 cross-country flight hours and 25 night, and cross-country flight hours.

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