Portions of a proposed route of flight where a user can flight plan the most advantageous flight path with no requirement to make reference to ground-based NAVAIDs.
Source FAA Pilot/Controller Glossary · checked 2026-08-25
Portions of a proposed route of flight where a user can flight plan the most advantageous flight path with no requirement to make reference to ground-based NAVAIDs.
Source FAA Pilot/Controller Glossary · checked 2026-08-25