Furuno USA Inc 9ZWRTR113 ユーザーズマニュアル

Select a mounting location, keeping in mind in the following points:

•  Install the antenna unit on the hardtop, radar arch or on a mast on an appropriate 

platform. 

•  Locate the antenna where there is a good all-round view. Where possible, there 

should be no obstructions to the scanning beam such as superstructure or rigging. 
Obstructions cause shadow sectors and decrease the overall performance of the 
radar. The loss of performance can cause false echoes and reduce the quality of 
the observed images. A mast for instance, with a diameter considerably less than 
the horizontal beam width of the radiator, will cause only a small shadow sector. 
However, a horizontal spreader, or cross trees in the same horizontal plane as the 
antenna unit, would be a much more serious obstruction. You would need to place 
the antenna unit well above or below it. Be sure there are no metallic objects near 
the antenna. 

•  It is rarely possible to place the antenna unit where a completely clear view in all 

directions is available. After fitting the antenna, determining any shadow sectors, 
their angle and bearing, and their influence on the radar is recommended.

Those items contain organic solvents that can damage 
coating and plastic parts, especially plastic connectors.

(a) Common mast

(b) Radar mast

Vertical beam angle = 22°