A measurement of force used to produce movement.

A standard series of aeronautical charts covering land areas of the world at a size and scale convenient for navigation (1:1,000,000) by moderate speed aircraft. Topographic information includes cities and towns, principal roads, railroads, distinctive landmarks, drainage, and relief. Aeronautical information includes visual and radio aids to navigation, airports, airways, restricted areas, obstructions and other pertinent data.

Volume of space above the station where a lack of adequate navigation signal directly above the VOR station causes the needle to deviate.

A term used in aviation for coordinated universal time (UTC) which places the entire world on one time standard.