System Activation and Test 3-17
9. Adjust the towfish within the water column so that it is at a safe altitude off
the bottom and under the boat wake (about 15 percent of range). A good
starting vessel speed is 4–5 knots. Check for the following:
• The image is satisfactory.
• Pitch, roll, depth, and altitude are being displayed.
• Speed and heading are being displayed from the navigation system.
10. Refer to the SonarPro User Manual (P/N 11210093) for instructions on how to
operate SonarPro to acquire, display and record sonar data.
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