Kongsberg Simrad ST90, Reference Manual

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Related topics
Operating procedures, page 79
Controlling the gain and range settings, page 94
TVG function, page 467
Adjusting the sonar range
Some echoes are close, others are further away. It is often necessary to adjust the radius of
the search area. On the ST90 system, this is referred to as
range .
Context
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
The range value selected and shown is by default only used by the active view.
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.
The selected range is divided into identical distances. These are shown as dotted circles.
They are referred to as
range rings .
An adjustable range ring can be added to the Horizontal and Vertical views. This ring is
referred to as the variable range ring .
Procedure
1 Click in the view you want to activate.
The active view is identified with a thicker border. Unless you use the
Apply to all
function, all changes you make will only be applied to this view.
2 Use the joystick to make the adjustment.
Tip
Optionally: Turn the relevant rotary switch to make the adjustment.
The Mk2 Operating Panel is fitted with three rotary switches. The switches are
identified with numbers. Each switch can be assigned a function related to range, gain,
bearing or tilt. Investigate the functionality provided on the
Operating Panel
page. This
page is located in the
Installation
dialog box.
Operating procedures