Navman FISH 4500, Installation And Operation Manual

Congratulations on choosing a Navman fish-
finder. For maximum benefit, please read this 
manual carefully before installation and use. 

This manual describes how to install and set up 
the FISH 4500/4600 and the associated dual-

The FISH 4500/4600 is a high quality, dual- 
frequency sonar fishfinder that is supplied with 
a dual-frequency transducer. It uses TFT (Thin 
Film Transistor) technology to provide a color 
display for easy daylight viewing that can be 
dimmed for night fishing. The bracket mounting 
option also allows the fishfinder to be tilted and 
swivelled for optimum viewing.

The colors on the sonar displays are customiz-
able, with a choice of four 16 color palettes and 
one 8 color palette. The colors  represent differ-
ent signal strengths, making the sonar displays 
easy to interpret.  

The dual frequency capability enables the 
FISH 4500/4600 to operate and display:

• 

At a high frequency of 200 kHz.

• 

At a low frequency of 50 kHz.

•  Both frequencies side-by-side on a split dis-

play.

• 

Both frequencies combined together into a 
single display. 

This capability, combined with a variable power 
output of up to 600 W RMS, ensures that the 
FISH 4500/4600  operates effectively in shallow 
and deep water.

The FISH 4500/4600 can detect the bottom to a 
depth of 2000 feet (600 metres) depending on 
the clarity of the water, the ultrasonic frequency 
chosen and the type of transducer used.

The Navman fishfinder can be used to find fish, 
to locate features on the bottom such as reefs 
or wrecks and to help recognize favourite fishing 
spots from the bottom profile.  

1-1 Benefits of the FISH 4500/4600

Important

It is vital to the performance of the fishfinder 
that the transducer is installed in the best 
location. Please follow the installation 
instructions very carefully.

This manual also explains how to operate the 
FISH 4500/4600 effectively and provides trou-
bleshooting information and performance tips. 

The Navman fishfinder can also assist with 
navigation by providing depth information to help 
identify the depth contours marked on charts. 
The FISH 4500/4600 is particularly suited to 
work with the TRACKER 5500/5600 - Navman’s 
color display GPS chartplotter with worldwide 
coverage. 

The two instruments can be connected together 
using either NavBus or NMEA, so they can 
share data.

IMPORTANT NOTE ON USE

. While any 

fishfinder can be used as an aid to navigation, 
accuracy can be limited by many factors, includ-
ing the location of the transducer. It is the user’s 
responsibility to ensure the Navman fishfinder is 
installed and used correctly.

With the optional fuel kit, the FISH 4500/4600 
also becomes a sophisticated and easy-to-use 
fuel computer.

All of the Navman 4000 Series fishfinders use 
new proprietary SBN

-II 

Technology for sonar 

processing to improve Signal enhancement, 
Bottom recognition and Noise rejection. 

SBN-

II

 Technology uses digital adaptive filter 

algorithms to enhance all returned signals. At the 
same time, SBN-

II

 Technology uses active noise 

control to reject interference, which can often be 
mistaken by fishfinders for true returns. 

Using SBN-

II

 Technology, the Navman fishfinder 

analyses the reflections from each pulse, filters 
false returns and displays what is in the water 
under the boat. See section 4-1 Interpreting the 
display, for more information.

frequency transom transducer. (If a through 
hull transducer is used, refer to the Installation 
Instructions supplied with that transducer.)  

1 Introduction

FISH 4500/4600 

Installation and Operation Manual

4

NAVMAN