Radar apparatus with antenna rotated at various speeds

摘要

Marine vessel radar apparatus has an antenna 1 rotated by a motor 2. The speed at which the antenna 1 is rotated is adjustable between about 20 rpm and 50 rpm. The speed may be adjusted by a manual control 8 or automatically, such as in response to a range setting of the apparatus, the speed of the vessel or target information received by the apparatus. <IMAGE>