CVS-841/851 Terminology
Operation Manual
Terminology
Alarming range
A user defined alarming range bar, which is displayed in the right side of the display. When a school of
fish or the seabed touches or enters this zone, an audio alarm will be activated.
A scope
Current echo signal is shown in a linear form at the right side of the screen, i.e. signal intensity in the
horizontal and depth in the vertical.
Bottom Alarm
The alarm that warns the existence of the sea bottom. The alarm is generated when the sounder has
detected the sea bottom within a preset depth.
Bottom Discrimination
Bottom image is zoomed with reference to the seabed. This feature allows an analysis of the sea
bottom, in addition to the type of fish school.
Bottom Lock
The sea bottom is always displayed flat with a normal display, which is shown on the upper half of the
screen. This allows easy finding of a fish school near the sea bottom and observing the entire sounder
image.
Bottom Zoom
The generic term of zoomed sea bottom presentations that includes the Bottom Lock, Bottom
Discrimination､and Bottom Zoom.
Color Alarm
An audible alarm function that is triggered when the sounder detects a school of fish in a specific color.
The color can be specified by the operator via the menu.
Comparison Mode
A video processing method to discern a weak fish school out of a large mass of fish schools. This
mode displays the result of the comparison between HIGH and LOW frequency echoes. If those
echoes are overlapped at the same depth, the resultant colors are displayed in mixed colors. However,
if the HIGH frequency echo is displayed in red (strongest color), the mixed color will also be red to
show the echoes are from small fish. If the mixed fish school is partly displayed with mixed colors
among red color, it suggests the possibility of a larger fish school among the small fish school.
93132682-00 (1)
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