Definition
The lowest values of weather conditions, altitudes, visibilities, fuel reserves, equipment performance, or other operational parameters that are legally or operationally permitted for a given flight activity. Common categories include takeoff minimums, landing minimums, instrument approach minimums (decision altitude/height or minimum descent altitude, plus required visibility or runway visual range), IFR fuel minimums, VFR weather minimums, and obstacle clearance minimums.
Plain English
The lowest numbers — for weather, altitude, visibility, fuel, or equipment — that you are allowed to accept and still legally or safely conduct the flight. Go below them and you are out of bounds.
Context Anchor
Seen on approach charts, in weather planning, in regulations, and heard as a cockpit callout during an instrument approach.
Derivation
From Latin 'minimum,' meaning 'the least.' In aviation, 'minima' (or 'minimums') are the floors — the smallest values that are still acceptable. Anything less is unacceptable.
Why Pilots Care
Directly governs go/no-go decisions on approaches; descending below published minima without required visual references violates regulations and compromises safety.
Intuition Check
Do not read minimums as a casual preference or recommendation. In aviation, minima are set limits that determine whether an operation is allowed.
Example Sentence 1
The ceiling and visibility were below approach minimums, so the pilot flew the missed approach and diverted to the alternate.
Example Sentence 2
When the runway environment remained obscured at the published minima, the pilot initiated a missed approach.