Furuno NAVNET 1933C-BB - Manual (Page 31)

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3. Insert four hex bolts (M12x60, supplied) and seal washers (
Ф
30, supplied) from the top
of the antenna housing, as shown below.
Hex bolt
Seal washer
Flat washer
Spring washer
Nut
Fixing the antenna unit chassis
4. Pass flat washers (M12, supplied), spring washers (M12, supplied) and nuts (M12,
supplied) onto hex bolts. Fasten by tightening nuts. Do not fasten by tightening the hex
bolts; seal washers may be damaged.
Antenna
unit
Mounting
platform
Silicone
sealant Flat washer
Rubber mat
Seal washer
How to fasten antenna unit to mounting platform
5. Coat flat washers, spring washers, nuts and exposed parts of bolts with anticorrosive
sealant.
6. Prepare ground point in mounting platform (within 300 mm of ground terminal on
antenna unit) using M6 x 25 bolt, nut and flat washer (supplied).
7. Run the ground wire (RW-4747, 340 mm, supplied) between the ground terminal and
ground point.