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1. MOUNTING
1.9
How to Fill the Dome with Sonar Oil
Fill the dome with sonar oil as shown below.
When the dome is not removed:
How to attach the socket plug
1. Remove the thread sealing tape from the socket plug.
2. Starting at the second thread, re-wrap three layers of
sealing tape around the threads.
3. Pinch the threads between your thumb and a finger to fit the tape with the threads.
4. Reattach the socket plug.
Note: The sealing tape is not re-usable after your remove the socket plug. Always re-apply
sealing tape after removing a socket plug.
When the dome is removed:
Fill the dome with sonar oil until the oil reaches the position
indicated in the figure to the right.
Note 1: When the ship is dry docked, drain antifreeze from dome when temperature
is lower than -20°C. Failure to do so can damage the dome.
Note 2: After filling the sonar oil, record the date that you filled sonar oil, referring to
section 3.16.
Note 3: If sonar oil comes into contact with the dome surface, clean the dome with a
surfactant. Sonar oil can adversely affect the acoustic capabilities of the dome if left
on the surface.
1-34
Socket plug (2 pcs)
Remove either one of the socket plugs
and fill the dome with sonar oil using a
hand pump until it overflows through the
hole.
WHEN SHIP IS DRY DOCKED
Fill sonar oil to
this position.
Filler hole is in
"high" position
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