Raymarine Ray 106 User's Guide download pdf (Page 90)

80 RayTech RNS V6.2 - User’s Guide

vector that is displayed on the target only. Relative vector mode is used for

collision avoidance and threat assessment.

True vector

A true vector indicates the targets motion over ground. In this mode, true

vectors for the target and your own boat are displayed. MARPA measures

the direction in which the target and your own boat are moving over the

ground. The result is the boat’s true course and speed. Consider this

motion as if you were in a helicopter looking down watching the targets

move across the water. This mode is used as an aid to navigation.

Target history

You can also view a target’s history, which appears as a trail of dots left by

the target as it travels. You can change the display interval of these dots.

To set up target vectors and history:

1. Click

Target Tracking

2. Click

MARPA Options

. The MARPA options dialog box is displayed.

3. Click the action boxes to set mode and distance as required.

4. Use the BACK button to return to the top level softkeys.

MARPA targets

Acquiring MARPA targets

You can acquire up to ten targets, which are then automatically tracked by

the MARPA system. The are three ways in which a MARPA target can be

acquired.

To acquire a MARPA target:

Method 1

1. Click

Target Tracking

2. Click

Acquire Target

3. Move the cursor over the target you want to acquire and click.

The target acquired symbol will appear at the cursor’s position, and the

radar will search for a target in the location. If a target is present for several

scans, the radar locks on to it and the safe target symbol appears. The target

ID number appears at the safe target symbol. The own vessel safe zone is

also displayed.

4. Repeat Steps 1 through 3 for each target you want to acquire.

Method 2

1. Move the cursor over the target you want to acquire.

2. Right click to display the right-click menu.

3. Highlight and click

MARPA

. The target options are displayed.

4. Highlight and click

Acquire

5. The target acquired symbol will appear at the cursor’s position, and the

radar will search for a target in the location. If a target is present for

several scans, the radar locks on to it and the safe target symbol

appears. The target ID number appears at the safe target symbol. The

own vessel safe zone is also displayed.

6. Repeat Steps 1 through 4 for each target you want to acquire.

Method 3

Double-click a target on the radar screen.

Cancelling a MARPA target

There are two ways in which a MARPA target can be cancelled.

To cancel a MARPA target:

Method 1

1. Click

Cancel Target

2. Move the cursor over the target you want to cancel and click.

3. The target symbol and ID will disappear from the screen and the target

is cancelled.

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Raymarine Ray 106 User's Guide Page 90

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