3-15
Figure 3-8: 4125 Tow Vehicle being Deployed
NOTE 1: For detailed towing characteristics for a number of tow cable
lengths and tow vehicle speeds, refer to APPENDIX C: TOWING
CHARACTERISTICS.
NOTE 2: For detailed information about the EdgeTech DISCOVER 4125
Side Scan Sonar software, including how to record data, refer to the
DISCOVER 4125 Side Scan Processor Software User’s Manual.
To deploy the tow vehicle:
1. With the survey vessel stopped or under way at up to two knots, slowly and carefully lower the
tow vehicle into the water, well away from the propeller. Do not let the tow vehicle strike the hull
of the survey vessel.
2. Lower the tow vehicle to a depth of about three meters, or just below the propeller wash.
3. Click the Towfish Control tab and select the range for each frequency. This tab is shown in Figure
3-5.
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