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instrument landing system |
Also found in: Wikipedia, Hutchinson | 0.02 sec. |
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instrument landing system [′in·strə·mənt ¦lan·diŋ ‚sis·təm] (navigation) A system of radio navigation which provides lateral and vertical guidance, as well as other navigational parameters required by a pilot in a low approach or a landing. Abbreviated ILS. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The pilot then adds power as necessary to maintain glideslope position as indicated on the tower's optical landing system. It can simulate Localizer and Glideslope (CAT I, II and III) signals with variable Difference in Depth of Modulation (DDM) settings. The lens, although it has different waveoff and cut light locations, has the same number and color of glideslope cells and datum lights and is set to a standard 3. |
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