Intro to IFR Question #18 - What are IFR standard takeoff minimums?

IFR Standard Minimums


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. 




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Chris caught the aviation bug at the age of seven when he was able to sit in the cockpit of a 737 between flights, thanks to his aunt working at a large airline. Countless balsa wood flyers and multi-stage rockets later, he enrolled in the Aviation Technology Program at the University of Cincinnati and successfully turned a fascination into a career. “One of my most memorable flights was flying my dad to a local airport with a restaurant just off the ramp known for their generously portioned ribs. I’ll never forget that day with passenger #1.” As the Director of Search Marketing at Sporty’s, Chris is tasked with managing online advertising and search engine optimization but he still loves to search for new products.

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