Kongsberg Simrad ST90, Reference Manual

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Note
The priority is identified with a "P". Only one single object can be given priority status.
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 priority target can be found in the lower 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.
Place Marker Continuous
Place Marker Continuous
is an on/off switch. Right-click and select
Place Marker Continuous
on the shortcut menu. When enabled, left-click in a ST90 view to add new marker. Each
click produces a new marker.
Manual tracking
You can initiate manual tracking by placing multiple markers on your target echo as it
moves in the view. The course and speed of the latest marker is found in the lower right
corner of the view. The values are calculated based on the last two markers you placed and
the time between each placement. This location of the markers in the view will then show
you the historic path of the target.
Related topics
Using markers in the ST90 user interface, page 346
About position tracking, page 359
Target markers
During normal operation, some echoes are clearly more interesting than others. In many
situations specific echoes may be regarded as
targets . To keep track of the targets you can
use target markers and/or start target tracking . When target tracking is activated, the bearing
and tilt settings are automatically adjusted to follow the movements of the tracked target.
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.
Once an echo has been provided with a marker in the display presentation it is regarded
as an
object .
Simrad ST90 Reference Manual