air-terminal
121terminal saccular period — the period or phase of prenatal lung development lasting, in different parts of the lungs, from the twenty sixth week or later until near term, and followed by the alveolar period. Walls of the air spaces become thinner and the spaces divide into …
122terminal radar service area — Airspace surrounding designated airports in which ATC (air traffic control) provides radar vectoring, sequencing, and spacing on a full time basis for all IFR and participating VFR (visual flight rules) aircraft. The service provided in TRSA is… …
123terminal route — A track defined by course, minimum altitude, and distance for bringing an aircraft from an initial approach fix to a fix from which a letdown procedure can be made. In some countries, terminal route altitudes are provided by ATC (air traffic… …
124air traffic control unit — A generic term meaning variously, area control center, approach control office, or aerodrome control tower. As the circumstances require, an ATC (air traffic control) unit may be (i) an area control center (ACC) established to provide ATC… …
125terminal control area — A control area or portion thereof normally situated at the confluence of air traffic service routes in the vicinity of one or more major airfields. See also airway; control area; controlled airspace; control zone …
126terminal velocity — 1. Hypothetical maximum speed a body could attain along a specified flight path under given conditions of weight and thrust if diving through an unlimited distance in air of specified uniform density. 2. Remaining speed of a projectile at the… …
127terminal velocity — The maximum speed to which a freefalling drop of blood can accelerate in air which is approximately 25.1 feet per second …
128terminal area facility — A facility providing air traffic control service for arriving and departing IFR (instrument flight rule), VFR (visual flight rule), special VFR, and, on occasion, en route aircraft …
