A radio-navigation chart may give minimum altitudes for route segments between navigation aids.

### Why this is right The material says that a radio-navigation chart determines headings, distances, and minimum altitudes for route segments between navigation aids. Minimum altitudes are therefore part of the route information pilots may need to follow. ### The concept A charted route segment is more than a line joining two facilities. It can include direction, distance, and altitude information that defines how the segment is to be flown. Pilots must use the applicable chart and procedures rather than assuming that a route’s geometry alone provides all operational requirements. ### Terms - **Navigation aid (NAVAID)**: a system or facility that supplies information for navigation. - **Minimum altitude**: the lowest altitude specified for a route segment or procedure. ### Remember Read route charts for altitude requirements as well as headings and distances.