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FISH 4350 / 4380 Installation and Operation Manual4
NAVMAN
1 Introduction
Congratulations on choosing a Navman Þ sh-
Þ nder. For maximum beneÞ t, please read this
manual carefully before installation and use.
This manual describes how to install and set
up the FISH 4350 or FISH 4380. Refer to
seperate Transducer Installation Instructions
supplied with the transducer.
The FISH 4350 and FISH 4380 are high quality
Þ shÞ nders that are supplied with a transducer.
Both use TFT (Thin Film Transistor) technology
to provide a colour display for easy daylight
viewing. The LED backlight can be dimmed for
night Þ shing. The bracket mounting option also
allows the Þ shÞ nder to be tilted and swivelled for
optimum viewing.
The colours on the sonar displays are cus-
tomizable, with a choice of four 16 colour
palettes and one 8 colour palette. The colours
represent different signal strengths, making the
sonar displays easy to interpret.
This capability, combined with a variable power
output of up to 200 W RMS, ensures that the
FISH 4350 and FISH 4380 operate effectively
in shallow and deep water.
The FISH 4350 and FISH 4380 can detect the
bottom to a depth of 600 feet (180 metres)
depending on the clarity of the water and the
type of transducer used.
The Navman Þ shÞ nder can be used to Þ nd Þ sh,
to locate features on the bottom such as reefs
or wrecks and to help recognize favourite Þ shing
spots from the bottom proÞ le.
The Navman fishfinder can also assist with
1-1 BeneÞ ts of the FISH 4350 and FISH 4380
Important
It is vital to the performance of the Þ shÞ nder
that the transducer is installed in the best
location. Please follow the installation
instructions very carefully.
navigation by providing depth information to help
identify the depth contours marked on charts.
IMPORTANT NOTE ON USE. While any
Þ shÞ nder can be used as an aid to navigation,
accuracy can be limited by many factors,
including the location of the transducer. It is
the users responsibility to ensure the Navman
Þ shÞ nder is installed and used correctly.
With the optional fuel kit, the FISH 4380 also
becomes a sophisticated and easy-to-use
fuel computer.
All of the Navman 4000 Series fishfinders
use proprietary SBN Technology for sonar
processing to improve Signal enhancement,
Bottom recognition and Noise rejection.
SBN Technology uses digital adaptive filter
algorithms to enhance all returned signals. At the
same time, SBN Technology uses active noise
control to reject interference, which can often be
mistaken by Þ shÞ nders for true returns.
Using SBN Technology, the Navman Þ shÞ nder
analyses the reß ections from each pulse, Þ lters
false returns and displays what is in the water
under the boat. See section 4-1 Interpreting the
display, for more information.
1-2 How the FISH 4350 and FISH 4380 work
The FISH 4350 and FISH 4380 have two parts:
- the transducer attached to the hull
- the display unit.
The transducer generates an ultrasonic pulse
(sound that is above the hearing range of the
human ear), which travels down towards the
bottom at a speed of about 4800 ft/sec (1500 m/
sec), spreading out into a cone shape.
When the pulse meets an object, such as a
Þ sh or the bottom, it is partly reß ected back up
towards the boat as an echo. The depth of the
object or bottom is calculated by the FISH 4350
and FISH 4380 by measuring the time taken
between sending a pulse and receiving the
echo. When an echo has been returned, the
next pulse is sent.
The FISH 4350 and FISH 4380 convert each
echo into an electronic signal, displayed as a
vertical line of pixels. The most recent echo
appears on the extreme right of the display, with
This manual also explains how to operate the
FISH 4350 and FISH 4380 effectively and gives
troubleshooting and performance tips.
4


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