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CM2 Sidescan Sonar User Manual
18. Wing Depressor
Launching the Towfish and Wing
Use the handle at the end of the wing when initially lowering the towfish. The wing handles can also be used
when reaching for the towfish to recover it.
Be aware that the wing can cause the towfish to glide forward on launch. Be careful that it does not head for
a propellor.
Towing the Towfish when Wing is fitted
Refer to the illustration for the effect of the wing hydrodynamic down-force on the towfish depth. For any
particular depth a shorter length of cable can be used, with reduced layback.
Depth Performance with and without Wing Depressor
Note also the increase in tow cable tension. Extra tension increases the power consumption of the winch (if
used) whilst hauling in the cable, and care must be taken not to overheat the winch motor.
The best way to reduce winch power consumption is to reduce tow speed as soon as the towfish is high
enough for safety.
Version 3.6 (2008)
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