![]() The 18" plate has a 5.6° beam, the 24" plate narrows that to 4.2°. The larger the plate, the narrow the beam. The Primus 880 Pilot's Guide illustrates beam widths for 12" and 18" radar plates, not for the 24" plate in the G450. The help to visualize the relationship between tilt angle, flight altitude, and selected range. The pilot must make adjustments for the effects of mountainous terrain. Assume the aircraft is flying over relatively smooth terrain which is equivalent to sea level in altitude.The pilot can use tilt management techniques to minimize ground clutter when viewing weather targets.Figure: Radar beam illustration high altitude 18-inch radiator, from Honeywell Primus 880 Pilot's Guide, figure 5-5.
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