1.4Mounting the Antenna Unit of MODEL1833C-BB
Mounting considerations
See the mounting considerations for the
The compass safe distance of 0.90 meters (standard compass) and 0.70 meters (steering compass) should be observed to prevent deviation of the magnetic compass.
Mounting the antenna unit of MODEL1833C-BB
1.Open the antenna unit packing box carefully.
2.Unbolt the four bolts at the base of the radome cover to remove it.
Radome cover
Antenna unit
The mounting surface must be parallel with the waterline and provided with five holes (four fixing holes and one cable entry) whose dimensions are shown in the outline drawing attached at back 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 (wood, steel*, or aluminum) of 5 to 10 millimeters in thickness for the antenna unit.
A mounting bracket for mounting the antenna unit on a sailboat mast is optionally available. (Refer to page
*: For steel platform, take appropriate measures to prevent corrosion.
Cable entry
Cable entry hole (approx. 
20)
Flat washer 
Spring washer 
M10 x 25 Hex bolt 
Ship's bow
10
Platform
