Installing the Sonar Head Unit
3-3
3.4
Installing the Sonar Head Unit
When installing the Sonar Head Unit,
lightly
grease the pins of the jumper cable
connector with silicone grease before connecting the deck cable to it. Silicone
grease serves an important lubricating and corrosion protection function. Use a
high quality, nonconducting grease such as Dow Corning DC-4. Before connecting
the deck cable, make a general inspection of the Sonar Head Unit. Check that the
fasteners holding it to the mounting platform are tight. A safety cable should also
be attached to the Sonar Head Unit in the event that it breaks free.
The Sonar Head Unit is mounted to the survey vessel by attaching the mounting
flange at the top to a standard 6-inch pipe flange or other mounting surface. A bolt
pattern for the mounting flange is provided in APPENDIX E: “Outline Drawings.”
For a typical, pole mount type over-the-side installation, this design is well suited
for attaching to the base of a pipe.
CAUTION
Avoid applying excessive silicone grease on the pins of the
jumper cable connector. Apply a light coat of grease only, and never put
grease into female connectors.
Figure 3-2:
Sonar Head Unit Mounting Flange and Bolt Circle
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