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3.6
Install a scanner on a trestle
Depending on your chosen location for the scanner, it may be easier to install the scanner if you
fabricate a trestle (or radar mast) on which you can mount the scanner.
The trestle must be sturdy and secure, and capable of supporting the scanner in all weather
conditions.
You are recommended to install the base of the trestle parallel to the water surface.
Orient the trestle so that the cable inlet on the scanner will face the stern, and so that the scanner can
be mounted at the correct angle (as discussed in the "Power boat installation" section).
Make sure that the edges of the trestle won't trap water.
3.7
Install the 4 kW scanner unit
IMPORTANT: Remember that you must screw the bolts into place from the underside of the location
site, because the shape of the scanner prevents you from installing the bolts from the topside. Ensure
that you can access the underside of the location site before drilling.
Tape the paper installation template securely to the chosen location site. Before drilling, check that:
the location site is not more than 0.6" (15 mm) thick, to ensure that you can use the bolts
supplied.
you've oriented the template correctly so that the front of the scanner unit faces the bow
and the cable inlet faces the stern.
the location site allows the drain hole in underside of the scanner to empty.
Drill the four bolt holes (and a hole for the drain hole to empty into, if necessary) then remove the
template and position the scanner over the bolt holes.
Place a spring washer, then a plain washer on to each bolt. Screw the bolts into the bolt holes from the
underside of the location site, and tighten securely using a torque wrench.
NOTE: Use the bolts supplied as these are hardened stainless steel and the correct length. Repeat this
procedure for the remaining bolts so that the scanner unit is secured in place.
Check that the scanner is secure.
Northstar 4 kW Radar Installation Manual
15
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