Congratulations on choosing a Navman
fish-finder. For maximum benef it, please read this
manual carefully before instal lation and use.
This manual describes how to install an d set
up the FISH 4432/4433 and the associated
dual-frequency transom tra nsducer. (If a through
hull transducer is used, refer to the Inst allation
Instructions supplied with that transducer.)
This manual also explains how to operate
the FISH 4432/4433 effectively and provides
troubleshooting information and performance tips.
The FISH 4432/4433 is a high quality, dual-
frequency sonar fishfin der that is supplied
with a dual-frequency transd ucer. It uses a 16
level greyscale FSTN display for easy dayl ight
viewing that can be dimmed for night f ishing.
The bracket mounting option also allows
the fishfinder to be tilted and swi velled for
optimum viewing.
The dual frequency capabilit y enables the
FISH 4432/4433 to operate and display:
• At a high frequency of 200 kHz.
• At a low frequency of 83 kHz.
• Both frequencies side-by-s ide on a split
display.
• Both frequencies combined togethe r into a
single display.
This capability, combined with a var iable power
output of up to 250 watts, ensures that the FIS H
4432/4433 operates effectively i n shallow and
deep water.
The FISH 4432/4433 can detect the bottom to
a depth of 750 feet (230 metres) depending
on the clarity of the water, the ultrasonic
frequency chosen and the typ e of transducer
used.
The Navman fishfinder can be use d to find
fish, to locate features on the bottom su ch as
reefs or wrecks and to help recognize f avourite
fishing spots from the bottom pr ofile.
The Navman fishfinder can also a ssist with
navigation by providing depth informati on to

1-1 Benefits of the FISH 4432/4433

Important

It is vital to the performance of the f ishfinder
that the transducer is installed in the b est
location. Please follow the installat ion
instructions very carefully.
help identify the depth contours ma rked on
charts. The FISH 4432/4433 is part icularly suited
to work with the TRACKER 5430/5380.
The two instruments can be connec ted
together using either NavBus or NMEA , so they
can share data. (only applies to FISH 4433)
IMPORTANT NOTE ON USE. While any
fishfinder can be used as an aid to nav igation,
accuracy can be limited by many factor s,
including the location of the transd ucer. It is
the user’s responsibility to ensure the Navman
fishfinder is installed and us ed correctly.
With the optional fuel kit, the FISH 4 433 also
becomes a sophisticated and easy-to -use
fuel computer.
All of the Navman 4000 Series fish finders use
new proprietary SBN-II Technology for sona r
processing to improve Signal enhancement,
Bottom recognition and Noise reje ction.
SBN-II Technology uses digital adaptive f ilter
algorithms to enhance all returned sig nals. At
the same time, SBN-II Technology uses ac tive
noise control to reject interference, w hich
can often be mistaken by fishfin ders for true
returns.
Using SBN-II Technology, the Navman
fishfinder analyses the ref lections from ea ch
pulse, filters false returns and di splays what is
in the water under the boat. See secti on 4-1
Interpreting the display, for more informati on.
1 Introduction
FISH 4432/4433 Installation and Operation Manual 6
NAVMAN