They can take off in “zero-zero” conditions. 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)
People Also Ask
(1) For day operations—1,000-foot ceiling and one-mile visibility. (2) For night operations—1,000-foot ceiling and two-mile visibility.
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.
If a low turn is required, the minimum height above ground for turn initiation is the greater of 50' or one half of the wing span of the aircraft. The maximum allowable bank angle below 400' AGL is 15 degrees.
Reportable values are RVR6,000 feet or less. When it is determined from a reliable source that the indicated RVR value differs by more than 400 feet from the actual conditions within the area of the transmissometer, the RVR data is not acceptable and must not be reported.
Single pilot operationsAn RVR of less than 800 m is not permitted except when using a suitable autopilot coupled to an ILS or MLS, in which case normal minima apply. The Decision Height applied must not be less than 1,25 x the minimum use height for the autopilot.
If visibility is less than the lowest reportable RVR value, an M is placed in front of it. Here, M0600 indicates the RVR for runway 18R is less than 600 feet. And if the visibility is greater than the highest reportable value, a P is placed in front of it.
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.
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.
1) Exemption 3585 allows the Flight Follower to release a flight to an airport or alternate when the TAF indicates, through the conditional statements (TEMPO, PROB, BECMG) that the weather could be below authorized landing minimums at the estimated time of arrival.