4-1
4.0 MAINTENANCE
The 4125 Series Dual-frequency Side Scan Sonar System is ruggedly designed and built, and therefore
requires little maintenance. However, to ensure long-lasting, reliable service, some periodic maintenance
is recommended.
Maintenance on the 4125 Series Dual-frequency Side Scan Sonar System should be performed on a regular
basis, or as often as necessary, depending on use. However, most of the maintenance is performed after
each deployment and recovery cycle of the towfish.
4.1 Cleaning the 4125 System
The 4125-P Portable and 4125-RM Rack Mount Topsides require minimal maintenance. However, the
TOWCABLE / SEA CABLE connector should be periodically lubricated, and the other connectors should be
inspected regularly.
To inspect and clean the towfish and the tow cable after use:
1. Wash down the towfish and the tow cable with clean, fresh water. Be sure to remove any debris
on the towfish body and tail fins.
2. Inspect the port and starboard transducer arrays, and thoroughly spray them to remove any
buildup of debris. If they exhibit any oily residue, clean them using a soft cloth, along with a mild,
non-abrasive detergent and water.
CAUTION! Do not use harsh chemical detergents on the transducer
arrays.
3. Inspect the tail fins for warping and replace them where necessary.
4. Inspect the shear pin and replace it if it is worn or damaged.
5. Dry the towfish in shade, and when dry, store it in its case.
4.1.1 Inspecting and Cleaning the Connections
Regularly inspect the contacts on the male pins of each underwater connector in the towfish and on the
tow cable for corrosion or oxidation. To remove any oxidation, rub the contacts lightly with 800 grit emery
cloth cut into strips equal to or less than the width of a contact. A pencil eraser can also be used for this
purpose. Clean the female sockets using a cotton swab and rubbing alcohol. A brush with only nylon
bristles can be used to remove light oxidation.
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