Plain English Meaning
Before planning a flight, the pilot collects everything they will need to plan it properly — current charts, weather reports, the aircraft's performance numbers, airport information, and any other references the flight will require.
Full Definition
The cross-country flight planning step in which the pilot gathers all charts, publications, weather products, performance data, and reference materials required to plan and conduct the flight before any route or fuel calculations begin.
Context Anchor
Seen at the start of preflight and cross-country planning, before choosing a route, checking weather, estimating , or reviewing details.