Onwa Marine Electronics KR-12X8 - Manual (Page 53)

Mounting platform
Holes for antenna unit:
The mounting surface must be parallel with the waterline and provided with four
holes whose dimensions are shown in the outline drawing attached at the end of
this manual. The unit is adjusted so a target echo returned from the bow direction
will be shown on the zero degree (heading line) position on the screen. When
drilling holes, be sure they are parallel with the fore and aft line.
3. Prepare a platform of 5 to 10 millimeters in thickness for the antenna unit.
Find the cable entry on the radome base. Next, position the radome base so
the cable entry faces the stern direction. This alignment must be as accurate
as possible. Fasten the radome base to the mounting platform with four each
of M10 x 30 hex bolts, flat washers and spring washers.
SHIP'S BOW
CABLE
ENTRY
FLAT WASHER
SPRING WASHER
HEX BOLT
Effective
thread length
Flat
washer
Spring
washer
Apply silicone sealant
Hex bolt
Platform
5 -10 mm
Antenna base plate
Packing
Radome
PLATFORM
4- 12 HOLES
Figure 6-3 How to fasten the radome base to the mounting platform
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