Today's Aeronautical Terms

National Aeronautical Charting Office
[Source: Instrument Procedures Handbook]

Traffic Information Service-Broadcast of Touchdown and Lift-Off Area
[Source: Instrument Procedures Handbook]

Charted VFR Flyways are flight paths recommended for use to bypass areas heavily traversed by large turbine-powered aircraft. Pilot compliance with recommended flyways and associated altitudes is strictly voluntary. VFR Flyway Planning charts are published on the back of existing VFR Terminal Area charts.
[Source: Pilot/Controller Glossary]

Course Deviation Indicator.
[Source: Instrument Flying Handbook]

A grouping of aircraft based on a speed of 1.3 times the stall speed in the landing configuration at maximum gross landing weight. An aircraft must fit in only one category. If it is necessary to maneuver at speeds in excess of the upper limit of a speed range for a category, the minimums for the category for that speed must be used. For example, an aircraft which falls in Category A, but is circling to land at a speed in excess of 91 knots, must use the approach Category B minimums when circling to land. The categories are A-E.
[Source: Pilot/Controller Glossary]