Furuno DRS6A X-Class Installation Manual page 13

3. Apply silicone rubber to the thread of the stud bolts (M1270, 4 pcs).
Note: Apply silicone rubber to the part of thte bolt threads that are inside the bolt
hole (see the figure at step 4).
4. Insert four stud bolts into the threaded holes in the antenna unit.
The stud bolts must make contact with the bottom of the threaded holes.
Note: Do NOT cover the vent hole at the bottom of the unit.
Detailed view
Silicone
rubber
Corrosion-proof
rubber pad
5. Place the antenna unit on the mounting platform with the BOW mark on the unit
aligned with the ship's bow.
BOW mark BOW mark
Stud bolt
Bow Bow
1. INSTALLATION AND WIRING
Vent hole:
Do NOT cover this hole.
Silicone rubber
Stud bolt