L3 comminications SERIES 5000, Operation And Maintenance Manual

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3-8
CHAPTER 3 Preparation for Use
Series 5000 Sonar System Operations and Maintenance Manual P/N 11210060, Rev. 13.0
1.
Remove the retaining ring from the beveled end of the tow pin, withdraw the
pin from the tow bracket and set it aside. Remove the two bolts and tow
brackets from the welded-on six-hole towing flange. Take note of the location
of the tow brackets for future reference.
2.
Position the K-Wing depressor over the towing flange in the same location as
where the tow brackets were previously connected. Secure the depressor to the
towing flange with the fasteners provided.
3. Align the tow shackle mounting hole with the mounting hole of the K-Wing
shackle on the tow depressor tow bracket. Insert the beveled end of the tow pin
through the holes in the tow cable shackle and the bracket, and secure the tow pin
with the retaining ring.
4. If the towfish was previously configured for towing without a depressor, it will be
necessary to extend the free length of the towfish 100-inch jumper cable in order
to reach the shackle connector. Do not extend more than is needed to make the
connection and to provide free rotation of the tow shackle. Remove the dummy
plug from the connector on the end of the tow cable. Apply a thin film of silicone
grease to the pins of the connector. Do not over grease. Align the male and female
connectors, and press the connectors together firmly. If necessary, use a slight
side-to-side rocking motion while pressing on the connector, but do not bend the
pins. When properly inserted there should be no gap between the surfaces of the
two connectors.
5.
Attach the shackle end of the safety cable to the bail grip loop on the tow cable
near the tow cable shackle. Attach the strap fork with clevis pin end to the safety
cable tab on the top of the towfish near the tail.
6.
If not already secured, use cable ties (7.5 x 0.185 in.), which are included in the
towfish spares kit, to fasten the safety cable to the cable hold-down clips on the
top of the towfish housing. Place a cable tie through the shackle pin hole and
wrap around the shackle pin to prevent the shackle from loosening. Use electrical
tape every 30 cm (12 in.) to secure the safety cable to the tow cable starting at the
top of the tow shackle and up the bail grip loop. Move the tow shackle forward
and back to check for smooth operation.
3.4.4 Tow Cable Disconnection
If possible, it is best to keep the tow cable connected to the towfish while on deck.
If the tow cable is disconnected, however, it is very important that all connectors
be properly maintained. Connectors must be kept clean and must remain out of the
way of traffic while on deck. L-3 Klein supplies dummy connectors which can be
used to protect the underwater connectors on the towfish and cable when they are
not mated to each other. The procedure for disconnecting the tow cable from the
towfish is as follows: