6 Setting the compass rose presentation to true or relative bearing

The ADCP (acoustic Doppler current profiler) information pane displays the velocities of the water currents in the horizontal and vertical directions. Horizontal water velocities are shown in a 360-degrees presentation resembling a compass rose. The vertical velocity is presented with a bar graph. Use the ADCP page to control the basic properties of the ADCP information pane.

Context

Horizontal water velocities are shown in a 360-degrees presentation resembling a compass rose. Your vessel is located in the centre of the presentation. Speed ranges are shown with dotted circles. Two different velocities are presented.

Water velocity

The measurement presents the estimated velocity of the water current within the active layer. The measurement is shown as a coloured arrow. The length of the arrow indicates the velocity of the water. The tip of the arrow indicates the direction.

If you have not selected a layer, the measurement is based on the entire depth of the water column.

The numerical values are shown at the bottom of the information pane.

Speed over ground/Course over ground

The ADCP information pane also presents the vessel's speed and course relative to the ground. The measurement is shown as a grey arrow. The length of the arrow indicates the speed. The tip of the arrow indicates the course.

The numerical values are shown at the bottom of the information pane.

The "compass rose" presentation will be applied with either cardinal or vessel relative directions.

Note

This is a visual enhancement. The choice you make has no effect on the overall performance of the EK80 system.

Procedure

Open the ADCP page.

Open the Active menu.

Select Information Pane Options

You can also open the Information Pane Options dialog box by selecting Setup in selected information panes.

Open the ADCP page.

Choose the appropriate settings for Compass.

•

Select Geographical to set up the presentation relative to the cardinal directions (north. south, east and west).

•

Select Vessel Relative to set up the presentation relative to the vessel directions (fore, aft, port and starboard).

Select Apply to save your choice.

Select OK to close the dialog box.