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In instrument flying, "approach minimums" specifically refer to the minimum weather requirements for an approach. This term outlines the least visibility and ceiling (cloud height) conditions that must be met for a pilot to safely execute an approach and landing at an airport under instrument flight rules (IFR).

These minimums are crucial for ensuring the safety of the flight, as they indicate the point at which the pilot can expect to have adequate visual reference to the runway upon arrival. If the weather conditions do not meet these specified minimums, the pilot must execute a missed approach and not attempt to land.

The criteria for approach minimums vary according to the specific approach procedure being used, which can depend on factors such as the type of navigation aids available and the terrain surrounding the airport.