NAVMAN FISH 4100 Installation and Operation Manual
Adjusting the Shading Bar
The Shading Bar is displayed as a horizontal bar in
the lower half of the screen. Use the Shading Bar to
choose the strength of the echoes to be displayed in
black on the screens. Echoes that are weaker are
displayed in black.
Increase the black part of the Shading Bar by pressing
if there are too few long (strong) echoes being
Decrease the black part of the Shading Bar by
pressing if there are too many long (strong) echoes
being displayed.
Manual Gain
When Manual Gain is selected, increasing the gain
setting will result in more detail being shown on the
fishfinder display. Decreasing the gain will reduce detail
being shown. See ‘Changing the Gain Mode’ in section
3-2 for more information on changing Gain settings.
Gain setting These strong echoes
will be shown in
chequered grey on the
Fish History screen
These medium echoes
will be shown in black
on the Fish History
The weak echoes within
this white section of the
shading bar will not be
shown - they are below
the threshold of where
the shading begins.
3-6 NAVIGATE screen
Select MAIN MENU - NAVIGATE to display the
NAVIGATE screen. The screen display is different
for the FISH 4100 and the FISH 4150.
The NAVIGATE screen displays useful information
while travelling at speed.
The FISH 4100 prominently displays the depth and
bottom. It also displays the engine-hours counter,
the battery voltage and any alarms that are enabled:
Depth can be displayed
in feet (FT), fathoms
(FA), or metres (M). Use
DEPTH menu to select
the required depth units
(see section 4-2).
The FISH 4150 prominently displays the water depth,
also the boat speed, the bottom and any alarms that
are enabled.
Speed is displayed
only on the FISH
4150. Speed can be
displayed in knots
(KN), miles per hour
(MPH), or kilometres
per hour (KPH). Use
SPEED menu to
select the desired
speed units (see
section 4-2).
Increasing Gain by
pressing + will move
the black bar to the
left and result in
weaker echoes being
displayed in the Fish
History section.
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