Conceptual framework for understanding phenomena.

Considering all parts as interconnected.

Final descent before landing airplane.

Valuation based on replacement cost.

(aviation) An approach (pre-landing procedure) using flight instruments for some or all navigation to the landing airport and runway, as opposed to one flown solely by visual reference to the ground.

(aviation) A go-around from an instrument approach performed, for whatever reason, at a time when the aircraft is at or above the applicable decision height or minimum descent altitude.