About position tracking

A position track permits the ST90 system to automatically control the tilt and bearing based on the movements of your vessel.

Example:

When you are manoeuvring close to the coastline, or in otherwise working in confined waters, you may wish to avoid shallow waters and reefs. To keep track of potentially dangerous places, you can start position tracking.

In this context, the phrase marker is used to identify a visual symbol placed in the display presentation. A marker is thus a graphical indicator used to identify and highlight specific locations or objects. Placing a marker on an echo identifies the echo as "interesting". It is regarded as an object that you can act upon.

Further classification of this echo as a target must be done manually.

The phrase position is used to identify a fixed echo in the display presentation that you wish to act upon. The echo may for example be from a shallow, reef or rock. You must decide which echoes that shall be classified as positions, and whether you shall start position tracking.

The phrase target is used to identify an echo in the display presentation that you wish to act upon. The echo may be from a material item, a shallow, reef or rock, or from fish, fish schools or mammals. In most cases, the target will move and continuously change its position relative to your own vessel. You must decide which echoes that shall be classified as targets, and whether you shall start manual or automatic target tracking.

Each marker is identified with its geographical location. Once an echo has been provided with a marker in the display presentation it is regarded as an object.

To start position tracking:

  1. Place the cursor on the echo from a potentially dangerous shallow or reef.

  2. Press Position Track on the Operating Panel.

or:

  1. Place the cursor on the echo from a potentially dangerous shallow or reef.

  2. Press the appropriate button on the operating panel: Place Marker

    This action assumes that you have configured one of the buttons on your operating panel to perform this specific function. This configuration takes place on the Operating Panel page. This page is located in the Installation dialog box.

    The Mk1 Operating Panel does not support this functionality.

or:

  1. Place the cursor on the echo from a potentially dangerous shallow or reef.
  2. Right-click to open the shortcut menu.
  3. Select Place Marker.
  4. Open the Objects menu.
  5. In the object list, select the object line to activate the control buttons for that particular object.

  6. Select Priority to give the currently selected object a priority status.

    If another object has this priority, the status is automatically transferred to the new object.

The marker is shown as a small triangle with or without a short identifying label. Once an echo has been provided with a marker in the display presentation it is regarded as an object.

The position track locks on a position defined by its latitude, longitude and depth. The bearing and tilt settings are automatically adjusted to compensate for the movements of your vessel. The bearing line is automatically locked on the object to reflects its bearing. The marker is stationary. If the echo moves in the display presentation the marker will not follow.

Note:

If you change the tilt and bearing settings manually, the position track is disabled.

The priority is identified with a "P". You can only give priority status to one object. If you create a new marker and give this priority, the position track is disabled. The same applies if you start a new target track.

Relevant information about the tracked object can be found in the bottom left corner of the view. If you think the text is small and hard to read, double-click on the text field. This will increase the text size.

Deleting a marker

There are two ways to delete a marker. You can use the shortcut menu, or select Delete in the Objects menu.

Tip:

You can delete a single marker, or multiple markers simultaneously, by selecting Delete in the Objects menu. If you use Delete Marker on the shortcut menu you can only remove one marker at a time.

  1. Place the cursor on the marker you wish to delete.
  2. Right-click to open the shortcut menu.
  3. Select Delete Marker.

or:

  1. Open the Objects menu.
  2. In the list of objects, check the box for the object you wish to delete.
  3. Select Delete.

To delete multiple markers:

  1. Open the Objects menu.
  2. Check Select All to select all the objects in the list.
  3. Select Delete.

or:

  1. Press the appropriate button on the operating panel: Delete All Objects

    This action assumes that you have configured one of the buttons on your operating panel to perform this specific function. This configuration takes place on the Operating Panel page. This page is located in the Installation dialog box.

    The Mk1 Operating Panel does not support this functionality.

Objects menu

The Objects menu provides a list of all current objects. This includes all types of objects including those classified as targets.

Tip:

The Objects menu provides additional functionality.

  • Check the box to identify an object you want to act on.
  • Select the object line to activate the control buttons and retrieve information about the object.

You can also click on the marker in the ST90 presentation to activate the control buttons. The selected marker is then shown with thicker lines.

Visual Objects menu

The Visual Objects menu controls which graphical elements that are shown in the different views. These graphic elements include markers, vectors and targets that are tracked. The majority of the functions are "on/off" buttons to enable or disable these graphic elements in the various views.