Kongsberg Simrad ST90, Reference Manual

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Using the markers and tracking features
Topics
Starting a position track, page 104
Starting a target track, page 105
Placing a new marker, page 107
Deleting a marker, page 108
Measuring the size of a school relative to the purse seine, page 108
Using visual aids during the purse seine catch phase, page 109
Selecting a geographical area for accurate target tracking, page 111
Defining the physical size of the tracking area, page 113
Choosing the fishing gear in use, page 114
Changing the fishing gear properties to match your own equipment, page 115
Starting a position track
A position track permits the ST90 system to automatically control the tilt and bearing based
on the movements of your vessel.
Context
The position track locks on a position defined by its latitude, longitude and depth.
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 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.
Tip
A new manually initiated tracked object is automatically given priority status. 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.
Simrad ST90 Reference Manual