What are IFR standard takeoff minimums?
IFR standard takeoff minimums for commercially operated aircraft under Part 121 and Part 135 operations require 1 statute mile visibility for single and twin-engine aircraft, and 1/2 statute mile visibility for helicopters and aircraft with more than two engines. Aircraft operating under Part 91 are not required to comply with established takeoff minimums.
A black inverted triangle with the letter “T” in it is an easy way to identify that an airport has non-standard takeoff minimums. Sometimes referred to as the “troubled T”, you can expect terrain or man-made objects to require an accelerated climb.
