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What is the signal that are added to the localizer signal, if the beam is narrow, to provide signal coverage?(a) Localizer plus(b) Difference signal(c) Sum signal(d) Clearance signalThe question was posed to me in my homework.I would like to ask this question from Instrument Landing Systems topic in section Landing Systems & Air-Traffic Management of Avionics |
Answer» CORRECT choice is (d) Clearance signal The EXPLANATION: When the localizer CSB pattern is narrow, to reduce reflections from buildings and other aircraft, the system requires the ADDITION of “clearance” signals to PROVIDE 35° coverage in both directions. |
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