(1) For day operations—1,000-foot ceiling and one-mile visibility. (2) For night operations—1,000-foot ceiling and two-mile visibility.
People Also Ask
With basic runway lights and ILS installation, an aircraft can land at an airport. This type of approach requires as a minimum a visibility of 550 meters or more and a cloud base of at least 60 meters (200 feet) or above.
For single and twin engine airplanes the standard departure visibility minimum is one mile. Many pilots flying under Part 91 believe using the approach and landing minimum visibility as a takeoff minimum makes sense.
Instrument approach procedures specify minimum flight visibility to land and minimum decent altitudes. If the clouds are too low or the visibility is very poor, a pilot still can't land. Flight visibility is just one factor, however. Rain can make it difficult to see out the windscreen.
Federal Aviation Regulations require that a pilot's distant vision be 20/20 or better, with or without correction, in EACH eye separately to hold a first or second class medical certificate. The standard for near visual acuity (16?) is 20/40 in each eye separately.