Kongsberg Simrad SN90 Reference Manual page 327

Related topics
User interface, page 294
Sonar views, page 316
Horizontal view, page 318
Range / Range Rings / Variable Range Ring
The distance from the vessel symbol in the centre of the circle to the outer ring
corresponds to the currently selected range.
The current settings for range, gain and tilt are shown in the upper left corner of the view.
Click on the text to make it larger. Click one more time to restore the original font size.
Range rings are a set of concentric circles labelled by distance from the vessel position.
The selected range is divided into identical distances. The range rings are shown as
dotted curves. Each ring has a range read-out. Use the
the range rings On or Off.
Variable Range Ring
dotted circle with its centre on the vessel symbol. The current range is shown next to the
circle. To change the range, left-click on the circle and drag to requested diameter. You
can use to manually define a range. The variable range ring can be used for
VRR Range
any type of distance measurement relative to the sonar.
Related topics
User interface, page 294
Sonar views, page 316
Horizontal view, page 318
Shortcut menu
Right-click in the view to open the shortcut menu. The options on the shortcut menu are
mainly related to markers.
In this context, the phrase marker is used to identify a visual symbol placed in the
display presentation. By placing a marker on the echo it is regarded as an object
that you can act upon. If relevant, you can further classify the object as a 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. You must decide which echoes that shall be
classified as targets, and whether you shall start target tracking.
Related topics
User interface, page 294
Sonar views, page 316
Horizontal view, page 318
381294/E
adds an adjustable range ring to the view. The ring is shown as a
User interface
function to toggle
Range Rings
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