vii
List of Figures
Series 4000 Towfish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Figure 3-1:
Tow Cable Termination at Towfish . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
TPU Back Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
TPU Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Figure 4-3:
Tail Cone Removed from the Towfish Housing . . . . . . . . . . . . . . . . . . . . . . 4-4
Figure 4-4:
Removing the Nose Cone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Figure 4-5:
Disconnecting the Transducer Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Figure 4-6:
Tightening the Locking Screws in the Towfish Housing Forward End Cap
Figure 4-7:
Screwing the Tail Cone Retaining Bolt into the Forward End Cap . . . . . . . 4-6
Transition Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Figure 4-13:
Aligning the Locking Screws before Inserting the Forward End Cap . . . . 4-10
Figure 4-14:
Aligning the Locator Pin in the Nose Cone with the Slot in the Towfish
Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Series 4000 Sonar System Operations and Maintenance Manual
4-6
P/N 11210094, Rev. 01