Lorenz FISH PRO HD+, Руководство пользователя

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12 User Manual
Digital Depth
Readout of the current bottom depth.
Water Temperature
Readout of the current water temperature returned by the TEMP 1 sensor
included into specific transducers.
Alarm Bar
Bars showing the shallow water and deep water alarm values. The alarm
is triggered when depth is outside the range.
Depth ruler
Vertical graduated bar. It is a scale which reflects the depth of the area
being displayed.
Variable Depth Marker (VDM)
Horizontal line on to the Echogram window with a depth label. The up/
down cursor keys can move it up and down. The label displays the depth
of the cursor position. It can be moved to any location pinpointing the
depth of a target.
Zoom Bar
Bar showing the portion of the Echogram currently represented in the
zoomed window (on the left part of the screen). It is turned on selecting
Echo Sounder display page.
A-Scope
A real time representation of fish and bottom features passing through
the beam of the transducer. It is drawn as horizontal lines whose length
and hue is proportional to the sonar strength returned. When the default
palette is selected, the strongest sonar returns will be shown as the color
displayed of the top of Color Bar while the weakest as the bottom color.
Operating Frequency
Readout of the selected operating frequency.
2.1.1 Understanding the Echogram display
The main elements that can be easily distinguished into an Echogram are:
White Line
5
3
Thermoclines
2
4
Surface Clutter
Structures
Fishes
1
6
Bottom Echo Profile
1
4
3
2
6
5
Fig. 2.1.1 - The Fish Finder Echogram
Fishes
Fishes are represented as arcs because of the cone angle of the trans-
ducer. In fact as the boat passes over the fish the leading edge of the