题目内容

ILS uses a combination of radio signals and, in many cases, high-intensity lighting ____ to enable a safe landing during Instrument meteorological conditions (IMC).

A. arrangement
B. lines
C. arrays
D. layout

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An ILS consists of two ____ sub-systems, one providing lateral guidance (Localizer), the other vertical guidance (Glideslope or Glide Path) to aircraft approaching a runway.

A. individual
B. independent
C. incident
D. innovative

An ILS consists of ____ guidance (Localizer) and vertical guidance (Glideslope or Glide Path) to aircraft approaching a runway.

A. lateral
B. horizontal
C. longitudinal
D. level

Aircraft guidance is provided by the ILS receivers in the aircraft by performing a ____ depth comparison.

A. adjustment
B. modification
C. modulation
D. rectification

A localizer (LOC) antenna array is normally ______ beyond the departure end of the runway and generally consists of several pairs of directional antennas.

A. adjusted
B. supported
C. located
D. equipped

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