Visibility and it’s use in determining if non-instrument approaches can be allowed

October, 21, 2021 by

Visual meteorological conditions (VMC) is a flight category in which visual flight rules (VFR) flight is permitted—that is, conditions in which pilots have sufficient visibility to fly the aircraft maintaining visual separation from terrain and other aircraft.

In Infinite Flight the definition that we apply to controlling is simplified to only visibility and we do not factor in cloud ceilings.

> For Infinite Flight only purposes, this is a MINIMUM of 3 statute miles (approx. 5000 meters) visibility.

If those conditions aren’t met then pattern work or non-instrument approaches would not be allowed.

If an aircraft is receiving radar vectors:

> [6.11.3](https://infiniteflight.com/guide/atc-manual/6.-radar/6.11-radar-vectors#6.11.3) — If the weather at the airport in question is below VMC (see 3.4 above), then aircraft must be vectored towards the instrument approach for the airport (ILS or GPS), and then handed over to Tower/Unicom at an altitude and position that allows for the aircraft to independently set up for an instrument approach to landing. In this case, descent to pattern altitude is not required, but a suitable altitude should be issued to take into account the position in relation to the airport and G/S.

AviationChampion is a writer for the IFATC Education Group. He lives in the United States currently residing in Ohio. He loves to control busy airports in his free time and work on things to keep himself busy. His favorite things to do include dirt biking, ATV riding, going to the beach, spotting airplanes at his local airport (KCMH), zip-lining and flying on Infinite Flight.