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1. MOUNTING
1.1 Mounting Considerations
• The radar sensor is generally installed either on top of the wheelhouse or on the radar mast on
a suitable platform. Locate the radar sensor where there is a good all-round view. Any obstruc-
tion will cause shadow and blind sectors. A mast for instance, with a diameter considerably less
than the horizontal beamwidth of the radiator, will cause only a small blind sector, but a horizon-
tal spreader or crosstrees in the same horizontal plane as the radar sensor would be a much
more serious obstruction; you would need to place the radar sensor well above or below it.
• It is rarely possible to place the radar sensor where a completely clear view in all directions is
available. Thus, you should determine the angular width and relative bearing of any shadow
sectors for their influence on the radar at the first opportunity after fitting.
• A magnetic compass will be affected if the radar sensor is placed too close to it. Observe the
compass safe distances mentioned in the SAFETY INSTRUCTIONS to prevent interference to
a magnetic compass.
• Do not paint the radiator aperture and radome to ensure proper emision of the radar waves.
• When this radar sensor is to be installed on large vessels, consider the following points:
• The two-way cable run between the radar sensor and MFDBB, MFD8, MFD12 or PSU-012
comes in lengths of 10 m, 15 m, 20 m
or 30 m.
• Deposits and fumes from a funnel or other exhaust vent can adversely affect the aerial per-
formance and hot gases may distort the radiator portion. The radar sensor must not be
mounted where the temperature is more than 55 degrees centigrade.
As shown in the figure below, the radar sensor may be installed on a common mast or on the radar
mast.
For DRS4A/6A/12A
(a) Common mast
(b) Radar mast