5. Press the OK button.

Radar overlay

You can combine the chart with the radar or MARPA functions to provide target tracking or to help you distinguish between fixed objects and other marine traffic.

You can enhance the use of your chart by combining it with the following radar features:

Radar range synchronization.

MARPA.

Radar overlay (for distinguishing between fixed and moving objects).

Radar range synchronization

When synchronization is switched on:

The radar range in all radar windows, changes to match the chart scale.

‘Sync’ is indicated in the top left-hand corner of the chart window.

If you change the radar range, in any radar window, all synchronized chart views change scale to match.

If you change the scale of a synchronized chart window, all radar windows change range to match.

Using the radar to view MARPA targets on the chart

The Mini Automatic Radar Plotting Aid (MARPA) function is used for target tracking and risk analysis. When MARPA is set up in radar mode or radar overlay, all MARPA targets are displayed in the chart window and associated MARPA functions can be accessed via the chart.

Using radar overlay to distinguish between fixed and moving objects

You can overlay radar image data over your chart image allowing better distinction between fixed objects and other marine traffic. For best results, switch on Radar-Chart synchronization to ensure radar range and chart scale are synchronized.

Enabling and disabling radar overlay

In the chart application:

1.Press the PRESENTATION softkey.

2.Press the CHART LAYERS softkey.

3.Press the RADAR OVERLAY softkey until the ON or OFF option is selected, as required.

Note: If radar overlay is applied to a chart window that is set to system view, the overlay will be displayed in all other system view chart windows.

Changing the radar range from the chart display

In the chart application:

1.Press the PRESENTATION softkey.

2.Press the CHART MODE AND ORIENTATION softkey.

3.Press the CHART SYNC softkey until the RDR option is selected.

4.Press the OK button.

5.Use the RANGE IN or OUT control to change the radar range.

Synchronizing the chart with the radar range

In the chart application:

1.Press the PRESENTATION softkey.

2.Press the CHART MODE AND ORIENTATION softkey.

3.Press the CHART SYNC softkey until the RDR option is selected.

Using the chart

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Raymarine C140w, C90w manual Radar overlay