NorthStar Navigation Northstar 2 kW - Manual (Page 19)

Northstar 2 kW Radar Installation Manual 19
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 2 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 dome prevents you from installing the bolts from the topside. Ensure
that you can access the underside of the location site
before drilling.
Find the paper installation template and tape it securely to the chosen location site. Before drilling,
check that
ƒ the location site is not more than 0.6" (15 mm) thick.
ƒ you have oriented the template correctly so that the front of the scanner unit will face the
front of the vessel.
ƒ the location site allows the drain hole to empty.
Drill the four holes where shown to a maximum depth of 0.6" (15 mm) plus the drain hole . Remove
the template then position a rubber washer over each drill hole. Check that the hole in the rubber
washer is aligned with the drill hole.
Position the scanner carefully over the rubber washers so that the bolt holes on the scanner are
aligned with the holes of the rubber washers and the drill holes.
Place a spring washer then a plain washer onto each bolt, as shown. Screw each bolt into each drill
hole from the underside of the location site, and tighten securely with a 5.31" (135 mm) torque
wrench.
NOTE: Use the bolts supplied as these are hardened stainless steel and the correct length.