L750 Fishfinder: Installation and Operation Handbook
36
finding fish. A particular type of fish will often prefer water in a
narrow temperature range.) From the System Setup display, you
can turn this item off or change the units used for this display.
13 - Fish arch or fish symbol
These markers indicate that the Fishfinder sees a fish. Generally,
the larger the fish arch or fish symbol appears, the larger the fish.
(The size of the fish symbol actually depends on a number of
factors. See the section on “Fish Indications.”)
If the fish is detected using the narrow 200 kHz beam, the display
will show a filled-in symbol. If the fish is detected by the wide 50
kHz beam, the display will use a hollow symbol. (For more on this,
see “Choosing the Frequency.”)
If the fish symbol feature is turned on, a number indicates the depth
of the fish shown by each fish symbol. This number will be shown
using the same depth units (feet, fathoms, or meters) you have
selected on the System Setup display. The fish depth indicator is
turned off when the fish symbol function is off.
Bottom of display
14 - Bottom indication
This shows the bottom of the lake or sea. You can compare this to
the range depth shown in the lower right-hand corner. (In this
example, the darker part of the display shows the unit is getting a
strong echo return from this section of the bottom. The lighter part
of the display represents a weaker return.
15 - Range
The “range” is the maximum depth the unit is set to measure. In
this example, this is 100 feet. You can set the range manually, or
the Fishfinder can do it automatically.
16 - Soft Keys
These can be used to call up different displays or change the set-up
of the unit.
17 - Bottom depth
This indicates the depth of the bottom directly under the boat. You
can select FT (feet), FA (fathoms), or M (meters) using the System
Setup display. If the Fishfinder can’t tell how deep the water is, the
last known depth flashes on the display. This will continue until the
unit can see the bottom again.
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