Instrument Operation

Arrivals or departures of an aircraft in accordance with an Instrument Flight Rules (IFR) flight plan or Special Visual Flight Rules (SVFR) procedures or an operation where Instrument Flight Rules (IFR) separation between aircraft is provided by a terminal control facility. There are three kinds of instrument operations: 1) Primary Instrument Operations: arrivals and departures at the primary airport which is normally the airport at which the approach control facility is located. 2) Secondary Instrument Operations: arrivals and departures at all the secondary airports combined. 3) Overflights: operations in which an aircraft transits the area without intent to land. (FAA2) (FAA13) (FAA14)