Navman 4432 Manuel D’Utilisation

To show the Sonar 83/200 display, press DISP  
and select Sonar Tab, select Sonar 83/200 
and press ENT.

This shows a split display, with the 83 kHz sonar 
history on the left side and the 200 kHz sonar 
history on the right side. Gain settings can be 
set independently for each frequency. Range 
settings  apply to both sections of the display.

To change items, press MENU until the 
Options menu is shown. Gain is explained 
in section 4-4 Gain. 

Range is explained in section 4-5 Range.

A-scope is explained in section 5-5 Sonar 
A-Scope display.

Data header is explained in section 5-1 
Sonar display.

Split ratio is explained in section 5-2 
Sonar Zoom display.

To show the Sonar Bottom display, press DISP  
and select Sonar Tab, select Sonar Bottom 
and press ENT.

This shows a split display, with the sonar history 
on the right side and the zoom section on the 
left. The bottom signal is shown as a flat trace 
in the centre of the zoom section.

Showing the bottom as a flat trace can make 
it easy to compare the echo strengths shown 
in the bottom signals. This can help to identify 
the type of bottom and objects close to the 
bottom. 

The zoom bar can only indicate the zoom 
range. It cannot indicate the zoom offset as 
this changes for each sounding displayed on 
the display. 

The zoom bar is fixed in the middle of the 
display.

See section 4-5 Range, for information about 
adjusting the Zoom Range and Zoom Offset.

To change items, press MENU until the 
Options menu is shown.

Gain is explained in section 4-4 Gain. 

Range is explained in section 4-5 Range.

A-scope is explained in section 5-5 Sonar 
A-Scope display.

Data header is explained in section 5-1 
Sonar display.

Bottom lock and Split ratio are 
explained in section 5-2 Sonar Zoom display. 

The user can define the level of the weakest 
and strongest echoes to be shown on the sonar 
displays, by using the Gain and Threshold 
settings. See section 4-4 Gain, for more 
information.

The strength of an echo at a particular depth 
is shown by the length of the horizontal line at 
that depth. A strong echo produces a long line 
whereas a weak echo produces a short line.

To change items, press MENU until the 
Options menu is shown. 

Gain is explained in section 4-4 Gain. 

Range is explained in section 4-5 Range.

Data header is explained in section 5-1 
Sonar display.

Split ratio is explained in section 5-2 
Sonar Zoom display.

Divider line 
between sonar 
history and 
A-scope

Gain setting 
(strongest echo 
for display)

Gain threshold 
(weakest echo for 
display)

To show the Sonar A-Scope display, press 
DISP  and select Sonar Tab, select Sonar 
A-Scope and press ENT.

Use this to analyse the sonar data in detail and 
optimize the Gain settings.

FISH 4432/4433 Installation and Operation Manual

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NAVMAN