NorthStar Navigation 8000I operation manual Set up the sounder, Change the transducer depth

19 Set up the sounder

You can make the following changes. These changes are global, meaning that they'll apply to all the Sounder screens.

You can:

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enter the transducer depth for your vessel

enter an offset if you need to calibrate the water temperature readout

enter a filter value to average the temperature readout over a number of readings

select the sounder speed offset value if you need to calibrate the sounder speed

enter a filter value to average the speed readout over a number of readings

IMPORTANT: You must enter an accurate transducer depth to obtain correct depth information from the sounder.

19.1Change the transducer depth

The transducer depth is the difference in depth between the water line and the location of the transducer on the hull.

The depth column on the extreme right of the Sounder screen shows the DBT (Depth Below Transducer), and not the the depth below the water line.

The default offset is 0. (This default assumes that the transducer is located on the hull at the water line.)

You must enter an accurate value for the transducer depth. If you don't, all the depths on

the Sounder screens will be wrong.

To change the transducer depth:

1.Select Display.

2.Select Setup from the control panel.

3.Select + Sounder to display a list of sounder specification options.

4.The Transducer Depth button shows the current setting. Select Edit, then enter the difference in depth between the water line and the transducer. For example, if the transducer is 5 ft (1.5 m) below the water line, just enter 5. If you want to check or change the distance units, (see "Select the small scale distance units" page 31) .

5.The new setting is applied immediately to all the Sounder screens.

6.When you are finished, select – Sounder.

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