1 - We see 5 objects on the radar that we want to target.

3- We choose to view data for "target" no. 4.

5 - We have activated Past track. Past track always shows relative movement.

8- We restart an example. Here we have enabled Auto Plot. The objects within the sectors will be targeted automatically. You can acquire the objects outside the sector boundary manually.

You can change the sector boundaries by placing the radar cursor on the corners, pressing and holding the left button on the mouse and then moving it.

Vector

Here you can choose the presentation of the vectors. Whether they should be True (white) or Relative (red), and their length.

Alarm limit

You set this yourself. Here it is set to give an alarm if a target comes within 0.5 nm. the nearest 15 min.

Auto Plot

Set out both automatic plotting zones.

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Past Track

Activate and set the time between each dot showing where the targeted object has been on the radar screen (see  below).

Acquire

Press this button, then place the radar cursor over the object you want to target and press the left mouse button.

Cancel          Deletes the selected targeted object.

Cancel all     Deletes all targeted objects.

Ackn. - Ackn. all    Turn off one or all alarms.

Sound                       You can turn the sound alarm off or on.

This info window shows data for a selected targeted object.

You select an object by pointing to it with the mouse cursor and pressing the left mouse button. The object has a square drawn around it.

You can also use the +/- buttons to select the next/previous object.The objects are numbered.

2- We start the target tracking, and after 30-40 seconds the relative vectors arrive.

4 - We select True vector to form an image of the lantern guidance.

7 - Notice that we have now selected a log that shows speed over the ground. We have included strong current to show that the True vector is different from the True vector calculated from the log showing speed through the water. In an ARPA course you will learn the meaning of this.