Kongsberg Simrad ST90, Reference Manual

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The range setting defines from how "far" you want to detect echoes. In other words,
you specify the horizontal or vertical distance from the vessel to the outer edge of
the search area.
Note
Even though you can choose a large range value, that does not mean that you can
detect your targets on the same range. The range value only defines the range that
is shown in the views. Actual target detection will always depend on the operational
environment, such as water temperature, salinity, interference and layers in the water
column.
(G)
These buttons are not used.
(H)
Cursor
Use this controller to move the cursor in the display presentation.
(I)
Tilt
The
Tilt
buttons allow you to control the vertical angle of the sonar beams.
(J)
Target Track
A target track permits the ST90 system to automatically control the tilt and bearing
based on the movements of the chosen target. It locks on the target defined by its
position, heading and speed. The bearing and tilt settings are automatically adjusted to
follow the movements of the tracked target.
(K)
Place Marker
Press
Marker
to place a generic marker in the active view. One or more markers can
be placed in the view to identify specific echoes. Each marker is shown as a small
triangle with or without a short identifying label. It is positioned based on the two
known axes in the view as well as the tilt and bearing of the current ping.
The marker is stationary. It has a specified range, bearing and depth related to your
own vessel. If the echo moves in the display presentation the marker will not follow.
(L)
Right mouse button
This corresponds to the right button on a computer mouse
(M)
Left mouse button
This corresponds to the left button on a normal computer mouse.
Related topics
Getting started, page 34
Operating panels, page 35
Getting started