A MISSED APPROACH can also be called Go-Around. It is a procedure initiated by the flight crew when, for any reason, it is judged that an approach or landing cannot be continued to a successful landing.
In ICAO terms, a missed approach procedure is the procedure to be followed if an approach cannot be continued. It specifies a point where the missed approach begins, and a point or an altitude/height where it ends.
POSSIBLE REASONS FOR A MISSED APPROACH
🟢 The required visual references have not been established by the Decision Altitude/Height (DA/DH) or Minimum Descent Altitude/Height (MDA/MDH), or is acquired but is subsequently lost;
🟢 The approach or landing is, or has become unstabilized;
🟢 The aircraft is not positioned so as to allow a controlled touch down within the designated runway Touchdown Zone with a consequent risk of aircraft damage with or without a Runway Excursion, if the attempt is continued;
🟢 The runway is obstructed;
🟢 Landing clearance has not been received or is issued and later cancelled; and
🟢 A go-around is being flown for training purposes with ATC approval.
REFERENCES
ICAO Annex 4
