Terminology
CVS-841/851
Operation Manual
Distance Traveled
A logged distance the ship has made. This feature is available only when the speed sensor device is
installed.
Draft Line
A sub menu function that adjusts the transducer depth in order to obtain the correct sounding depth in
shallow waters.
Dual frequency Mix
A sonar video processing method to detect weak schools of small fish like anchovy, utilizing the
sounder’s inherent characteristic that small fish are sensitive to high frequency sonar pulses but
insensitive to low frequency.
Dual Frequency Normal
A mode of screen presentation in that both high and low frequency images are shown on the screen.
Echo Length Alarm
An audible alarm function that is triggered when the sounder detects a school of fish of a certain length.
The length can be specified by the operator via the menu.
Fish Alarm
An audible alarm function that is triggered when a school of fish, which size and color are specified,
exists within a predetermined alarming depth range.
Fix Shift
Using this mode, the image starts from a preset depth within a selected range.
Format
The arrangement of the navigational data sentence supplied from an external navigator device.
Gain
The degree of the receiver sensitivity, which can be controlled by the operator’s GAIN control (HIGH or
LOW).
Gain Control Law
A sub menu function that selects the receiver gain control law. The selectable law is Linear and Log.
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