Choosing the sonar range
The Range function allows you to specify the maximum theoretical vertical depth and horizontal distance covered by the M3 Sonar.
Context
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The M3 Sonar Sonar Head can operate at different predefined near and far ranges. The range values you can select vary depending on the current frequency and selected sonar application.
The range value is defined from the Sonar Head.
Note
You cannot change the range until the Sonar Head is connected. Right-clicking in the sonar view and the range slider bar will both be disabled until the sonar is running.
Even though you can choose a large range value, that does not mean that you can detect your targets on the same range. The range value only defines the range that is shown in the views. Actual target detection will always depend on the operational environment, such as water temperature, salinity, interference and layers in the water column.
Procedure
1 Click SetupConnect to start the Sonar Head.
2 Right-click inside the sonar view to display the range menu.
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3 Select the desired near and far range from the menu.
Note
You can change the units of measurement in the Preferences dialog box.
4 You can increase or decrease the range using the range slider bar to the left of the sonar view.
Click the top arrows to increase or decrease the far range.
Note
To change the depth range settings in the 3D Point Cloud window, click Depth, uncheck the Adaptive Palette box, enter the top and bottom depth, then click Apply.
Result
The range is displayed with measured intervals in the sonar view. The current range will be updated when the Sonar Head is running.
Tip
Enabling Depth Tracking will automatically adjust the range according to the current depth when the head is running. To enable this feature, select the Depth Tracking checkbox in the Profiling Settings dialog box.