Navman Fish 4350, Fish 4380 Installation And Operation Manual

English.............. 2

Español........... 28

Português....... 59

NAV MAN

www.navman.com

FISH 4350 / 4380

FISHFINDER

Installation and

Operation Manual

FISH 4350 / 4380 Installation and Operation Manual2

NAVMAN

FCC Statement

Note: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a normal
installation. This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an output on a circuit different from that to
which the receiver is connected.
Consult the dealer or an experienced technician for help.
A shielded cable must be used when connecting a peripheral to the
serial ports.

IMPORTANT

It is the owner’s sole responsibility to install and use the instrument and transducers in a
manner that will not cause accidents, personal injury or property damage. The user of this
product is solely responsible for observing safe boating practices.

NAVMAN NZ LIMITED DISCLAIMS ALL LIABILITY FOR ANY USE OF THIS PRODUCT IN A
WAY THAT MAY CAUSE ACCIDENTS, DAMAGE OR THAT MAY VIOLATE THE LAW.

Governing Language: This statement, any instruction manuals, user guides and other
information relating to the product (Documentation) may be translated to, or has been translated
from, another language (Translation). In the event of any conß ict between any Translation
of the Documentation, the English language version of the Documentation will be the ofÞ cial
version of the Documentation.

Fuel Computer: Fuel economy can alter drastically depending on the boat loading and
sea conditions. The fuel computer should not be the sole source of information concerning
available fuel onboard and the electronic information should be supplemented by visual or
other checks of the fuel load. This is necessary due to possible operator induced errors such
as forgetting to reset the fuel used when Þ lling the tank, running the engine with the fuel
computer not switched on or other operator controlled actions that may render the device
inaccurate. Always ensure that adequate fuel is carried onboard for the intended trip plus a
reserve to allow for unforeseen circumstances.

This manual represents the FISH 4350 and FISH 4380 as at the time of printing. Navman NZ
Limited reserves the right to make changes to speciÞ cations without notice.

Copyright © 2003 Navman NZ Limited, New Zealand. All rights reserved. Navman is a registered
trademark of Navman NZ Limited.

The FISH 4350 and FISH 4380 are set up with default units of feet, °F (Fahrenheit),
US gallons and knots. See section 3-7 Setup > Units, to change the units.

FISH 4350 / 4380 Installation and Operation Manual 3

NAVMAN

Contents

1 In tro duc tion.............................................................................................4

1-1 BeneÞ ts of the FISH 4350 and FISH 4380..................................................... 4

1-2 How the FISH 4350 and FISH 4380 work ...................................................... 4

2 Basic Op er a tion......................................................................................5

3 Setting up the FISH 4350 and FISH 4380..............................................7

3-1 Setup > System.............................................................................................. 8

3-2 Setup > Sonar ................................................................................................ 8

3-3 Setup > Fuel (FISH 4380 only) ...................................................................... 9

3-4 Setup > Data ................................................................................................ 10

3-5 Setup > Logs.................................................................................................11

3-6 Setup > Alarms..............................................................................................11

3-7 Setup > Units ............................................................................................... 12

3-8 Setup > Comms (FISH 4380 only) ............................................................... 12

3-9 Setup > Calibrate ......................................................................................... 12

4 Using the FISH 4350 and FISH 4380 ...................................................13

4-1 Interpreting the display................................................................................. 13

4-2 Fish detection and display............................................................................ 16

4-3 Gain.............................................................................................................. 17

4-4 Range........................................................................................................... 18

5 The Displays .........................................................................................18

5-1 Sonar display .............................................................................................. 19

5-2 Sonar Zoom display ..................................................................................... 19

5-3 Sonar Bottom display ................................................................................... 19

5-4 Sonar A-Scope display................................................................................ 20

5-5 Fuel display (FISH 4380 only)...................................................................... 20

5-6 Data display ................................................................................................ 21

6 Installation and Maintenance ..............................................................21

6-1 What comes with this product? .................................................................... 21

6-2 Options and Accessories.............................................................................. 21

6-3 Mounting and removing the display unit....................................................... 21

6-4 Wiring Options ............................................................................................. 22

6-5 Systems of several instruments .................................................................. 23

6-6 Cleaning and maintenance .......................................................................... 24

Appendix A - SpeciÞ cations ...................................................................24

Appendix B - Troubleshooting ...............................................................25

Appendix C - How to contact us ............................................................90

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 cus­tomizable, 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 user’s 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.

FISH 4350 / 4380 Installation and Operation Manual 5

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2 Basic Operation

Key Operation

The Þ shÞ nder is operated through menus.

To select a menu item:

1. Press

or to move the highlight to the

item.

2. Press

to select the item.

To change a setting:

1. Use the cursor keys

or

to make the

change(s).

2. Press

to conÞ rm; to cancel.

Power On / Auto Power

Press to turn the Þ shÞ nder on.

If the Þ shÞ nder is wired for auto power, it turns
on automatically whenever the boat’s ignition
is turned on. This ensures that the engine

hours counter and optional fuel functions are
activated. A title display appears brieß y. This is

followed automatically by the Installation menu
only the Þ rst time the Þ shÞ nder is switched
on. Use this menu to specify the language (see
section 3-1 Setup > System) and units (see
section 3-7 Setup > Units).

At all other times, the title display is followed by
the display that was used most recently.

If the transducer is not connected, the message:

No transducer detected. Enter
simulate mode? will appear. Press

or to

select and press to accept. (If the
transducer was not intentionally disconnected,
turn off the Þ shÞ nder and refer to the section on
Troubleshooting in Appendix B.)

Key Names

Returns to the previous menu / zooms in.

,

Cursor keys move the selection highlight and

change settings / scrolls up or down.

ConÞ rms changes / zooms out.

MENU Press to show the Display menu

Press again to show the Setup menu.

+ Increases the Range.

_

Decreases the Range.

Press and hold to power On and Off; pressing

once shows the Gain controls. Press twice to
show Backlight control.

the older echoes being scrolled towards the left,
eventually disappearing off the display.

The scroll speed depends upon the water
depth and scroll speed setting. See section
3-2 Setup > Sonar and section 4-1 Interpreting
the display, for more information.

The appearance of echoes displayed are

affected by:

• the Þ shÞ nder settings (range and gain

settings)

• echoes (different Þ sh types, different

bottom types, wrecks and seaweed)

• noise (water clarity and bubbles).

See section 4-1 Interpreting the display, for
more information.

Hold for Auto Range

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Power Off

To turn the Þ shÞ nder off, hold . A countdown
box appears. Continue to hold

for 3 seconds

until the Þ shÞ nder turns off.

Note: If the unit is wired for Auto Power
(section 6-4 Wiring options) the Þ shÞ nder can
be turned off only when the boat’s ignition is
turned off.

Simulate Mode

An internal simulator allows
users to learn how to operate
the Þ shÞ nder off the water.

In Simulate mode the word
Simulate flashes at the
bottom of the display. The
fishfinder generates data
so that all the main displays
appear to be operational.

Use Setup > Simulate as follows:

1. Press MENU twice to show the Setup
menu.

2. Highlight Simulate.

3. Press

to select On or Off.

Gain Adjustment

Gain (sensitivity)
controls the amount
of detail displayed on
the screen. Refer to
section 4-3 for more
information.

1. Press

brieß y
to show the gain
controls.

2. Press

or to

adjust gain.

3. Press to switch between auto and
manual gain.

4. Press or MENU to conÞ rm and exit.

Display Adjustment

The display and
keys are backlit,
with a choice of 16
bright-ness levels. To
change the backlight
level:

1. Press

twice to
show the back­light control.

2. Press

to dim or

to brighten.

3. Press to conÞ rm.

FISH 4350 / 4380 Installation and Operation Manual 7

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3 Setting up the FISH 4350 and FISH 4380

Press MENU twice to show the Setup menu, then select a particular option using the

or

cursor

keys. (Section 2 Basic Operation, describes how to use the keys in more detail.)

The Setup menu and options are summarized below. The factory default settings are shown

where applicable. Each Setup menu option is explained in the following sections.

The Setup menu and options

System - see section 3-1 Sonar - see section 3-2

Simulate - see section 2

Comms - see section 3-8

Alarms - see section 3-6

Data - see section 3-4

Logs - see section 3-5

Units - see section 3-7

Calibrate - see section 3-9

Fuel - see section 3-3

FISH 4350 / 4380 Installation and Operation Manual8

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Press MENU twice to display the Setup menu,
then select System:

Language

Select the language for the displays. The
options are: English, Italian, French, German,
Spanish, Dutch, Swedish, Portuguese, Finnish
and Greek.

Tip: In case you can’t read the current
language, the language setting is found at the
top of the system menu.

Backlight

The backlight control
is displayed. The bar
setting represents
the current level of
backlighting.

Key beep

Enables or disables
the beep when a key
is pressed.

3-1 Setup > System

Auto power off

Select On to have the fishfinder power off
automatically every time the boat’s ignition
is switched off. This applies only if the display
unit is wired for Auto Power. See section 6-4
Wiring Options.

Snooze Mode

This power
saving option
slows the
sounding rate
(time between
each ultrasonic pulse) to a user speciÞ ed
interval from 5 minutes to 2 hours. The
Þ shÞ nder appears to turn off, however all
alarms operate normally. To return to normal
operation, press any button. Ideal to be used
as an anchor alarm.

Factory reset

This option returns all of the Þ shÞ nder settings
(except the language) to the default factory
settings shown in section 3 Setting up the
FISH 4350 and FISH 4380.

“Reset to factory defaults?” appears.
Press to

select Yes or No. Then press MENU

or to reset and exit.

3-2 Setup > Sonar

Press MENU twice to display the Setup menu,
then select Sonar:

Scroll speed

Use this to set the scroll speed on the display.
There is a choice of: Very Fast, Fast, Me-
dium, Slow and Pause. The depth of the
water also affects the speed of the display.

Faster scroll speeds combined with a slow boat
speed (typically between 2 and 6 knots) shows the
most Þ sh detail. Medium or Slow scroll speeds
result in sonar information being displayed over a
longer period, but with less detail. See Section 4-1
Interpreting the display, for more information.

Fish Þ lter

Use this to select the minimum Þ sh symbol size
to be detected and displayed. There is a choice
of: Small, Medium and Large.

FISH 4350 / 4380 Installation and Operation Manual 9

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These features
can be used only
when the optional
single or twin en­gine fuel kit has
been installed.

Press MENU
twice to display
the Setup
menu, then
select Fuel:

Fish symbols can be shown in three ways:

• As a Þ sh symbol (On).

• As a Þ sh symbol with the depth
(On+depth). The depth is shown beside
the Þ sh symbol.

• Switched off (Off) so that echoes are
not converted to Þ sh symbols but are
displayed directly.

See section 4-2 Fish detection and display, for
more information about Þ sh symbols.

Interference Þ lter

This Þ lters the echo signal to reduce high-level,
spiky interference, such as engine noise.

It can be switched On or Off.

Data header

The data header can be turned On or Off.
When On, it is a customizable feature that can

be used to display up to 6 data items, such as
boat speed or fuel used.

To customize the size of the Data header,
highlight Size and press

. There is a choice

of Small and Large.
To customize the data items to be displayed:

1. Highlight Data setup and press

. The Data
header increases in size to display all 6
data Þ elds. Some data Þ elds may be blank.

2. Use

or to move from data Þ eld to data

Þ eld.

3. Press

at any data Þ eld to show the list of

data items that can be displayed there.

4. Highlight the required data item and press
. The data item is immediately displayed in

that data Þ eld.

5. Press or MENU when Þ nished and the

Data header resizes automatically.

Palette

Use this to select a colour palette. Each colour
within the palette represents a different echo
strength, as shown on the sonar displays.

There is a choice of Þ ve colour palettes: Black,
Blue, White, Vivid and 8 colour. The Þ rst
four display more detail, whilst the 8 colour
palette shows a greater distinction of signal
strength between each adjacent colour. For
the 16 colour palette, each colour covers 1.5
dB signal range. For the 8 colour palette, each
colour covers 3 dB signal range.

Colour bar

This shows the range of colours used for the
selected colour palette.

It can be switched On or Off. If switched On,
it is displayed down the left hand side of all the
sonar displays.

Digit size

Use this to change the size of the depth display
on the sonar displays. There is a choice of:
Small, Medium and Large.

Bottom lock

If Bottom lock is On, the zoom section moves
so the bottom is always displayed in the zoom
section, regardless of changes in depth.

If Bottom lock is Off, the bottom will not be
displayed in the zoom section when it is outside
the range covered by the zoom bar.

Using the Bottom Lock and the A-Scope
features together can be a powerful aid in
recognising the type of bottom.

Fish symbols

These appear only in the main sonar displays.

3-3 Setup > Fuel (FISH 4380 only)

Warning

Navman fuel kits are only suitable for petrol/
gasoline engines. Fuel consumption can
change drastically depending upon the
boat loading and the sea conditions. Always
carry adequate fuel for the journey, plus a
reserve.

It is recommended that the fuel tank capacity is
measured by draining the fuel tank, then Þ lling
it to capacity. After Þ lling, note the reading from
the fuel dispenser’s gauge.

Note: Beware of air pockets, especially in
underß oor tanks.

FISH 4350 / 4380 Installation and Operation Manual10

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When asked Are you sure? select Yes.

Tank size

Enter the capacity of the fuel tank.

Num. engines

Set the number of engines to 0, 1 or 2. If 0 is
selected the fuel features are turned off.

Calibrate

See section 3-9 Setup > Calibrate.

Flow Þ lter

Most engines do not draw fuel from the tank at
a steady rate. To give a stable fuel ß ow reading,
the Þ shÞ nder calculates the ß ow value(s) by
taking several measurements and averaging
them. Use the Flow Þ lter to set the period over
which the fuel ß ow is averaged.

For twin engine installations, the fuel ß ow for
each engine must be adjusted separately.

The Flow Þ lter can be set from 0 to 10 seconds.
Use the lowest value which gives a stable ß ow.
Usually a value of 5 seconds (default setting)
will give a satisfactory result for two-stroke
carburettor engines.

This setting affects the Fuel ß ow and Fuel
economy reading on the Fuel display (see
section 5-5. Fuel display) but it does not affect
the Fuel used reading.

Tank full

Select Tank full each time the fuel tank(s)
are completely reÞ lled. When asked Are you
sure? select Yes. Otherwise, the reading
on the Fuel display (see section 5-5 Fuel
Display) and the Low Fuel Alarm (see section
3 -6 Setup > Alarms) are meaningless.

Set remaining

Before doing a partial reÞ ll of the tank or remov-
ing fuel manually from the tank (for example,
by siphoning it off):

1. Note the Remaining reading on the
Fuel display.

2. Note how much fuel is added or removed.

3. Calculate how much fuel is now in the
tank.

4. Select Set remaining and update
the reading.

It is essential to do this whenever some fuel
is added or removed. Otherwise, the reading
on the Fuel display (see section 5-5 Fuel
Display) and the Low Fuel Alarm (see section
3-6 Setup > Alarms) are meaningless.

Clear Used

Select Clear used to set Used (the amount
of fuel used) to zero. Do this to start measuring
the amount of fuel used over a certain time or
distance.

3-4 Setup > Data

Press MENU twice to display the Setup menu,
then select Data:

3. Press

at any data Þ eld to show the list

of data items that can be displayed there.

4. Highlight the required data item and press
. The data item is immediately displayed

in that data Þ eld.

5. Press or MENU when Þ nished.

Time base

To change the Time base of the temperature
graph, select Time base and press . Choose
between 5 mins, 10 mins, 20 mins, 1 hour and
2 hours and press to conÞ rm.

Data setup

To change data items (FISH 4380 only):

1. Select Data setup, and press

2. Use

or

to move from data Þ eld to

data Þ eld.

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3-5 Setup > Logs

Press MENU twice to display the Setup menu,
then select Logs:

The values can be changed independently of
each other. These log values are saved when
the unit is turned off.

Reset trip dist (FISH 4380 only)

This resets the trip distance to zero.

Reset total dist (FISH 4380 only)

This option resets the total distance to zero.

Reset engine hours

Use this option to reset the engine hours to zero.
This can be useful after an engine service or to count
the engine hours between service intervals.

c Alarm Beeper Alarm condition is

Name Cycle met when the:

Too

1

/5 sec depth is less than
shallow the alarm trigger value
Too

1

/2 sec depth is greater than
deep the alarm trigger value
Fish 1 short echo matches the Þ sh

beep proÞ le selected by
Þ sh Þ lter

Temp.

1

/2 sec temperature equals
the alarm trigger value
Temp.

1

/2 sec rate of change of
rate temperature equals the

alarm trigger value
Low

1

/2 sec battery voltage is
battery less than the alarm
trigger value

Low

1

/2 sec fuel remaining equals
fuel the alarm trigger value.

3-6 Setup > Alarms

Press MENU twice to display the Setup menu,
then select Alarms:

Trigger settings can be deÞ ned to suit the boat
and individual preferences as follows:

Alarms can be set (enabled) to automatically
detect certain conditions, such as the water being
too shallow. Alarms that are enabled are shown
as black icons in the Alarm status box on the
sonar displays.

When an enabled alarm is triggered, the beeper
sounds, an alarm message is displayed and the
alarm status icon is shown in red.

Press

or MENU to acknowledge the alarm,
stop the beeper and close the alarm window.
This does not disable the alarm.

Alarms automatically re-enable

The Too shallow, Too Deep and Low
battery alarms automatically re-enable

when the value moves outside the alarm
trigger setting.

The Temperature alarm automatically re­enables when the temperature is more than

0.45°F (0.25°C) above or below the alarm
trigger setting.

The Temperature rate alarm automatically
re-enables when the rate of temperature
change falls below the trigger setting by more
than 0.2°F (0.1°C) per minute.

Flashing Light and/or External Beeper

(FISH 4380 only)

If a secondary alarm indicator is required, a ß ash-
ing light and/or external beeper can be installed.
These can be positioned anywhere suitable on
the boat. See section 6-4 Wiring options.

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3-7 Setup > Units

Press MENU twice to display the Setup menu,
then select Units:

The default units
are shown in
this example.

Distance

Select from:

• nm (nautical miles)

• mi (miles)

• km (kilometres)

Speed

Select from:

• kn (knots)

• mph (miles per hour)

• kph (kilometres per hour)

Depth

Select from:

• ft (feet)

• m (metres)

• fa (fathoms)

Fuel

Select from:

• Litres

• USGal (US gallons)

• ImpGal (Imperial Gallons)

Temperature

Select either:

• °F (Fahrenheit)

• °C (Celsius)

3-8 Setup > Comms (FISH 4380 only)

Use this feature when the FISH 4380 is
connected to other Navman instruments or
any NMEA compatible instrument.

Press MENU twice to display the Setup menu,
then select Comms:

NMEA

NMEA is generally used with third party
instruments. Select On to transmit NMEA
sentences (see Appendix A - SpeciÞ cations).
Otherwise, select Off.

NMEA data

Use this to specify which NMEA sentences will
be transmitted (see Appendix A - SpeciÞ cations
and section 5-6 Data display, for information
about how to display NMEA data).

Press MENU twice to display the Setup menu,
then select Calibrate:

The fuel options
can be calibrated
only when the
optional single or
twin engine kit is
installed on petrol/
gasoline engines.

Speed

Calibration may be
required because different hull shapes have dif­ferent ß ow characteristics.

Obtain an accurate measurement of the boat's
speed from a GPS receiver; or by following an-

3-9 Setup > Calibrate

other boat travelling at a known speed; or by
making a timed run over a known distance.

Note: for accurate calibration:

• The speed from a GPS receiver should be

greater than 5 knots.

• The speed from another paddlewheel trans-

ducer should be between 5 and 20 knots.

• Best results are achieved in calm conditions

where there is minimal current (best at high or

low tide).
Use the cursor keys to display the speed readout
box, then increase or decrease the readout to
match the independent speed value.

Temperature

The factory settings should be sufÞ ciently accu-

FISH 4350 / 4380 Installation and Operation Manual 13

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rate for normal usage. To calibrate the tempera­ture readout, Þ rst measure the water temperature
with a thermometer known to be accurate.

Use the cursor keys to display the temperature
readout box, then increase or decrease the
value to match the measured temperature. The
temperature can be set from 32° to 99.9°F (0°
to 37.7°C) with a resolution of 0.1° unit.

To change the units between °F (Fahrenheit) or
°C (Celsius), see section 3-7 Setup > Units.

Fuel

Calibrating the fuel usage can improve the
accuracy of fuel measurements.

Twin engine installations require each fuel
transducer to be calibrated. This can be done
at the same time with two portable tanks or at
different times using one portable tank.

Calibrating the fuel transducer(s) requires
accurate measurement of the fuel consumption.
This is best done using a small portable tank. At
least 4 gallons (15 litres) of fuel should be used
to ensure an accurate calibration.

It is often very difÞ cult to Þ ll underß oor tanks
to the same level twice due to air pockets,
so the more fuel used, the more accurate the
calibration.

To calibrate the fuel transducer(s), perform the
following steps:

1. Record the level of the fuel in the tank(s).

2. Connect the portable tank(s) to the
engine through the fuel transducer(s).

3. Run the engine at normal cruising speed
until at least 4 gallons (15 litres) of fuel
has been used per engine.

4. Check the actual amount of fuel used per
engine by reÞ lling the portable tank(s) to

Note: Boat illustrated uses a through hull transducer

Water surface

Depth of transducer

Negative
value

Transducer

Positive
value

the original level and noting the reading(s)
from the fuel dispenser’s gauge.

5. Select Fuel. Use

or

to change the
reading to match that on the fuel dispens­er’s gauge.

6. Press

when the reading is correct.

Note: If the fuel calibration options appear
to give erroneous readings after a while, Þ rst
check that the fuel sensor has been installed
correctly according to the installation instruc­tions supplied with it, then see Appendix B

- Troubleshooting.

Keel Offset

Keel offset is a depth correction representing the
vertical distance between the depth transducer
and the location from which the depth is to be
measured.

Enter a positive keel offset value when the
transducer is located below the water surface
but the total depth is required.

Enter a negative keel offset value when the
depth below the deepest part of the boat is
required (such as the keel, the rudder or the
propeller) and the transducer is located closer
to the water surface.

Use the cursor keys to select Keel offset,
then press

to display the Keel offset box.

Use the

or cursor keys to adjust the

value.

4-1 Interpreting the display

The sonar displays do not show a Þ xed distance
travelled by the boat; rather, they display a
history, showing what has passed below the
boat during a certain period of time.

The history of the sonar signal displayed
depends the depth of the water and the scroll
speed setting.

In shallow water, the echoes have a short

4 Using the FISH 4350 and FISH 4380

This section explains how to interpret the
sonar displays and how Þ sh are detected and
displayed.

It also describes Gain and Range and shows

examples of some of the different sonar
displays. Also see section 1-2 How the FISH
4350 and FISH 4380 works.

distance to travel between the bottom and the
boat. In deep water, the history moves across
the display more slowly because the echoes
take longer to travel between the bottom and
the boat. For example, when the scroll speed
is set to Fast, at depths over 600 ft (180 m) it
takes about 2 minutes for each vertical line of
pixels to move across the display, whereas at

FISH 4350 / 4380 Installation and Operation Manual14

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Bottom

Large school
of Þ sh

Strength of echoes

The colours indicate differences in the strength
of the echo. The strength varies with several
factors, such as the:

• Size of the Þ sh, school of Þ sh or other

object.

• Depth of the Þ sh or object.

• Location of the Þ sh or object. (The area

Single Þ sh

Kelp / Weed

Hard
bottoms
such as
rock or coral
show as
wide bands

Soft bottoms
such as mud,
weed and
sand show as
narrow bands

Bottom types

Mud, weed and sandy bottoms tend to weaken
and scatter the sonar pulse, resulting in a weak
echo. Hard, rocky or coral bottoms reß ect the
pulse, resulting in a strong echo. See section
5-3 Sonar Bottom display.

Small school
of Þ sh

20 ft (6 m) it takes only about 25 seconds.

The scroll speed can be set by the user to
display either a longer history with less Þ sh
information or a shorter history with more Þ sh
details. See section 3-2 Setup > Sonar.

If the boat is anchored, the echoes all come
from the same area of bottom. This produces
a ß at bottom trace on the display.

The screen shot shows a typical sonar display
with the Fish symbols turned Off.

covered by the ultrasonic pulse is a rough
cone shape and the echoes are strongest
in the middle.)

• Clarity of water. Particles or air in the water

reduce the strength of the echo.

• Composition or density of the object or

bottom.

Note: Planing hulls at speed produce air
bubbles and turbulent water that bombard
the transducer. The resulting ultrasonic noise
may be picked up by the transducer and
obscure the real echoes.

Frequency and cone width

The pulse generated by the FISH 4350 and
FISH 4380 transducer travels down through
the water, spreading outwards to form a rough
cone shape. Inside the cone, the return signals
are the strongest. The cone width is dependent
upon the transducer design and the frequency
of the pulse: with Navman’s transom mount
supplied, it is about 15°. The chart shows
how the cone width varies over depth for each
frequency used. Figures are approximate.

Depth 200 kHz

15°

50

100

150

200

250

0

13

27

40

54

67

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Shadows

Shadows are created around areas where the ultrasonic beam cannot ‘see’. These areas include hollows
on the bottom or beside rocks and ledges, where the strong echoes returned off the rocks obscure the
weak echoes of the Þ sh and may also create a double bottom trace. See following for an example of
the sonar display in such an environment. A double bottom trace is shown on the display.

Sonar display of same area

Þ sh is visible on the display

Þ sh is hidden by the strong echoes off the

bottom and is not shown on the display

Example of shadows

Þ sh is visible on the display

1 minute ago

30 seconds ago

Now

When the Þ sh symbol
option is on, any echo
returned that Þ ts the
proÞ le of a Þ sh is
displayed on the screen
with a Þ sh symbol.

Navman Þ shÞ nders display the most recent events on the right of the screen.

Moving boat

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Note: Times indicated are for illustration only.

1 minute ago Now

Time

Stationary boat

When a boat is stationary, all bottom echoes will come from
the same small area of bottom. This will produce a ß at bottom
trace on the screen.

The appearance of the Sonar and Zoom screens can

be changed to suit individual preferences.

4-2 Fish detection and display

Where to Þ nd Þ sh

Underwater features like reefs, wrecks and
rocky outcrops attract Þ sh. Use the sonar to
Þ nd these features, then look for Þ sh by passing
over the feature slowly several times using the
Zoom display (see section 5-2 Sonar Zoom
display). If there is a current, the Þ sh will often
be found downstream of the feature.

When fishing with the FISH 4350 and FISH
4380 with the Fish symbols Off, a weak fuzzy
band may appear between the bottom trace
and surface. This might indicate a thermocline

- a rapid change in water temperature, such
as the edge of a warm or cold current. The
temperature difference can form a barrier which
the Þ sh may not swim through. In fresh water,
Þ sh often collect around a thermocline.

Fish symbols

The Þ sh symbol can be customized or
switched off altogether so that the echoes
are not converted to Þ sh symbols on the
display. See section 3-2 Setup > Sonar. The
differences between Fish symbol On and
Off are:

Fish symbols On

Using Navman’s SBN sonar technology the
Þ shÞ nder analyses all echoes and eliminates
most false signals and clutter so that remaining
targets are most likely Þ sh. Depending on the

strength of
the remain­ing echoes,
they are
displayed as
either small,
medium or
large Þ sh
symbols

- with or
without
depth. While
the SBN
process­ing is very
sophisticated
it is not foolproof - there will be times when
the Þ shÞ nder will not be able to differentiate
between large air bubbles, rubbish containing
air, Þ shing ß oats etc. and Þ sh.

The following picture shows the Sonar display with
the Fish symbol: On + depth:

Fish symbol Off

For experienced users this always provides the
best information as every echo is displayed,
whether it is surface clutter, a thermocline or
a Þ sh.

The picture in section 4-1 Interpreting the
display, shows the Sonar display with the Fish
symbols Off. The Þ sh appear as arches.

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Transducers Installation Guide).

• If the boat is anchored then Þ sh will tend to

show on the display as horizontal lines as
they swim into and out of the transducer
sonar beam. Slow speeds in deeper water
give the best Þ sh arch returns.

• Range is important. It will be much easier

to see Þ sh arches when using zoom mode
to concentrate on a particular section of
water, rather than just displaying everything
from the surface to the bottom. Zooming
increases screen resolution up to 100 times.

• It is difÞ cult to get Þ sh arches in shallow

water as the transducer sonar beam is very
narrow near the surface and Þ sh do not stay
within the beam long enough to display an
arch. Several Þ sh in shallow water tend to
display as randomly stacked blocks of pixels.

• Wave motion may result in distorted fish
arches.

Fish arches

In good conditions and with Fish symbols Off,
a Þ sh passing through the cone-shaped ultra-
sonic pulse is displayed as a Þ sh arch.

A Þ sh arch occurs when a Þ sh enters the weak
edge of the sonar cone, generating a weak echo
that is displayed as the Þ rst pixel of the Þ sh arch.
As the Þ sh moves closer to the middle of the
cone, the distance between the transducer and
the Þ sh reduces and the echo is displayed at
progressively shallower depths, producing the
start of an arch. When the Þ sh passes directly be-
neath the middle of the cone, the echo becomes
strongest and thickest. As the Þ sh passes out of
the middle of the cone the reverse happens with
a progressively weaker and deeper echo.

There are many reasons why Þ sh arches may
not be seen. For example:

• Poor transducer installation (see Transom

4-3 Gain

Gain (sensitivity) controls the amount of detail
displayed on the FISH 4350 and FISH 4380.
Understanding how to set suitable Gain settings
is important for optimum performance.

The Navman Þ shÞ nder has two gain modes,
Auto Gain and Manual Gain. Normally the
best results are obtained in Manual Gain, but
practice and experience are required to obtain
the optimum settings for different conditions.
Therefore, the use of Auto Gain is strongly
recommended when learning to use the
Þ shÞ nder or when travelling at speed.

• In Auto Gain, the gain adjusts

automatically to compensate for water
depth and clarity.

• In Manual Gain, the gain can be adjusted

by the user to compensate for water
depth and clarity.

High Gain settings may amplify the normal back­ground noise until it appears as random pixels.

Changing between Auto and Manual

To change between Auto Gain and Manual
Gain:

1. From any Sonar display, press

.

2. Use the

cursor key to select Auto or

Manual.

Adjusting Gain settings

1. From any Sonar display, press .

2. Use the or cursor keys to change the
gain.

Unwanted
signal

Gain
Threshold
line

Gain line

Note: The Gain mode
automatically changes
to Manual Gain if the
gain setting is adjusted
by the user.

Obtaining the best
results

To obtain the best
detection capability for
both fish and bottom
we recommend the
user adjusts the gain in the A-Scope display
until the threshold line is just to the right of the
unwanted noise:

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4-4 Range

Range is the vertical depth displayed on the
FISH 4350 and FISH 4380.

The Navman Þ shÞ nder has two range modes,
Auto Range and Manual Range:

• In Auto Range, the Þ shÞ nder adjusts

the depth range automatically so the
bottom is always shown in the lower part
of the display. The use of Auto Range is
recommended for normal conditions.

• In Manual Range, the Þ shÞ nder shows only

a selected depth range. In areas of rapidly
changing bottom depth, such as the sea
ß oor around pinnacles, it can be useful
to prevent the display from rescaling to
always show the bottom. If the bottom is
deeper than the speciÞ ed depth range, it
will not be shown on the display.

Changing the Range Mode

To change between Auto Range and Manual
Range, hold the + or -. The Range mode is
displayed at the bottom of the screen.
Press the + or - key to change to increase
or decrease the range to the desired depth.
Values can be set between 10 ft (3 m) to 600
ft (180 m).

Zoom Range and Zoom Offset

On the Sonar Zoom and Sonar Bottom displays,
a vertical bar is shown on the far right of the
display. This is the zoom bar. The zoom bar
shows the zoom range; that is, the area that
is magniÞ ed.
Use the

or cursor keys to adjust the
zoom range.
Use the

or cursor keys to adjust the

zoom offset.

5 The Displays

Press MENU once to show the Display menu,
then select a particular display using the or

cursor keys then press to conÞ rm. (Section
2 Basic Operation, describes how to use the
keys in more detail.)

The Display menu is summarized here
and each display is shown in the following
sections.

Most displays have an Options menu so that
relevant features can be changed quickly.

The Display menu

Split Ratio

Use this to change the split ratio between the zoom and the sonar history sections displayed. The
default split ratio is 50%.

1. Highlight Split Ratio and press

.

A left arrow and right arrow appear on either side of the divider line.

2. Use the or cursor keys to adjust
Hint: Press to return to the last sonar display used. Press MENU then to return to the previously
selected display. Use this to switch between two frequently used displays.

Refer to Section 3-2 Setup > Sonar, for information about customizing features on the sonar
displays.

Full screen display of Sonar history (section 5-1)
Split display with Sonar and zoomed section (section 5-2)
Bottom trace displayed as ß at line in zoomed section (section 5-3)
Split display with Sonar and echo strength (section 5-4)
Fuel data (section 5-5)
Water temperature, depth history and other boat data (section 5-6)
See below.

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5-1 Sonar display

To show the Sonar display highlight Sonar
and press :

This display scrolls from right (most recent
echoes) to left (oldest echoes). (see section
3-2 Setup > Sonar).

Data header, set up to show
the water temperature, battery
voltage (See section 3-2 Setup
> Sonar)

Colour bar

Depth (medium size digits)

Range

Bottom

Surface

Fish symbols with depth

5-2 Sonar Zoom display

To show the Sonar Zoom display, highlight
Sonar Zoom and press :

The split display shows the sonar history on the
right side and the zoom section on the left.

The zoom bar on the far right shows the area
that is magniÞ ed in the zoom section. See
section 4-4 Range, for information about
adjusting the Zoom Range and Zoom Offset.

Zoom bar

Sonar history

Zoom section

Divider line

5-3 Sonar Bottom display

To show the Sonar Bottom display, highlight
Sonar Bottom and press .

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 ß at trace
in the centre of the zoom section.

Showing the bottom as a ß at 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 Þ xed in the middle of the display.

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

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5-4 Sonar A-Scope display

To show the A-Scope display, select Sonar A­Scope and press . Use this to analyse the sonar
data in detail and optimize the Gain settings.

displays, by using the Gain setting. See section
4-3 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.

Fish recognition

The echo strengths shown on the A-Scope can
be useful in recognising the type of Þ sh. Different
species of Þ sh have different sizes and shapes
of swim bladders. The air in the swim bladder
reß ects the ultrasonic pulse, so the strength of
the echo varies between Þ sh species according
to the size and shape of the swim bladder.

When fishing among a school of fish and
catching them, note the Þ sh species and the
strength of the echo that it returns on the
A-Scope. Then, when that particular echo is
seen at future times on the Þ shÞ nder, it is likely
to be the same Þ sh species.

The user can deÞ ne the level of the weakest
and strongest echoes to be shown on the sonar

Divider line
between
sonar
history and
A-Scope

Gain setting
(strongest
echo for
display)

Gain threshold
(weakest echo
for display)

To show the Fuel display, select Fuel and
press

.

(See section 3-3 Setup > Fuel for information
about setting up the fuel values. If the number
of engines is set to 0, the fuel features are
turned off.)

Used shows total fuel used since this was last
reset with the Clear Used command.

Remaining shows the amount of fuel
remaining in the tank(s).

Flow shows the fuel consumption per hour.
For twin engine installations, the fuel ß ow for
each engine is shown separately. This is useful
for checking that both engines are under the
same load.

Economy is the distance travelled per unit of
fuel used. The Þ shÞ nder calculates this from
the boat speed and fuel used. The bigger this
number, the better the fuel economy. Adjust
the throttle and trim to achieve the best fuel
economy. Note that the FISH 4380 uses a
paddlewheel transducer to measure speed,
used to calculate the fuel economy. Therefore,
calibration of the boat speed measurement is
essential for an accurate fuel economy reading.
See section 3-8 Setup > Calibrate.

5-5 Fuel display (FISH 4380 only)

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5-6 Data display

To show the Data display, select Data and press . The data
display shows a graph of the water temperature and depth over
time and other selected data items.

The graph is useful for locating warm and cold spots in
the water.

Refer to section 3-4 Setup > Data to change the displayed
data items and temperature graph time base. To change
units, refer to section 3-7 Setup > Units.

time base
(Select from 5 minutes to 2 hours)

Correct installation is critical to the performance of the FISH 4350 and FISH 4380. There are two
components to install, the display unit and the transducer. It is vital to read the entire installation
section of this manual before attempting to install the components.

6 Installation and Maintenance

6-1 What comes with this product?

Standard conÞ guration:

• FISH 4350 or FISH 4380 display unit

• Power cable*

• Mounting bracket (screws included)

• Warranty registration card

• This manual

• Sun cover for display unit

• Flush mounting kit*

• Transom transducer (includes cable kit and screws)

• Transom Mount Transducer Installation Manual.

* denotes FISH 4380 only.

• TRACKER series of chartplotters

• Through hull depth transducer

• Through hull speed/temperature transducer*

• Fuel ß ow kit (single or twin engine)*

• Replacement paddle wheel*

• Carry bag

• REPEAT 3100 (see section 6-5 Systems of

several instruments).

Please consult your Navman dealer for more
information. * denotes FISH 4380 only

TRACKER 5500

chartplotter

Fuel ß ow kit

6-2 Options and Accessories

Display unit

Screws

Power cable

Mounting bracket

Transom transducer

6-3 Mounting and removing the display unit

There are two mounting arrangements:

• Flush mounting requires a solid panel

with access behind for wiring and mounting
screws. After ß ush mounting, the FISH 4350

and FISH 4380 cannot be tilted or moved
after installation to reduce any unwanted
glare or reß ections. Carefully select the best
viewing position before installation. This

FISH 4350 / 4380 Installation and Operation Manual22

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would generally be in a shaded area.

• Bracket mounting requires a panel for

mounting the bracket. Ensure that the panel
is not likely to deform and is not subject to
excessive vibration. The bracket can be tilted
and rotated so the FISH 4350 and FISH 4380
can be removed after each use.

Select a position where the display unit will be:

• At least 4" (100 mm) away from the compass.

• At least 12" (300 mm) away from any radio

transmitter.

• At least 4 ft (1.2 m) away from any antenna.

• Easy to read by the helmsman and crew

while underway.

• Protected from physical damage during

rough sea passages.

• Easy to access the 12 V DC power source.

• Convenient to route the transducer cables.

Flush Mounting

1. Cut a hole in the bulkhead for the display

unit using the ß ush mount template.

2. Drill four holes for the mounting studs using

the ß ush mount template.

3. Screw the four studs into the brass inserts
in the back of the display unit.

4. Sit the display unit in place and Þ t the
washers and nuts to the studs.

Bracket Mounting

1. Fix the mounting bracket onto the boat using the
three stainless steel screws. Do not overtighten
the screws, as the bracket may not rotate.

2. Push the display unit onto the mounting
bracket and tighten it Þ rmly using the knob
on the mounting bracket.

3. Attach the cables.

Removing the display unit

The display unit can be removed after each
use for protection against the environment or
security reasons.

When removing the display unit, ensure that
the plugs left in the boat are not exposed to
the elements. Push the attached dust covers
over the exposed ends of the plugs. Keep the
display unit in a dry clean place such as the
optional Navman carry bag.

Warning

1 Amp fuses must be positioned where
shown in the wiring diagrams.

The power/data cable contains 5 wires:

Wire Function

Black Ground (power negative)
White* NMEA out
Red Positive power in, 12 V DC

Yellow Auto power in (connect to

red wire. Positive power in, to enable
Auto power).

Green* External beeper or light out, switched

to ground, 30 V DC 200 mA

maximum.

Note: The cable shield is connected to Pin 1
(black wire) and does not need to be grounded.
* Denotes FISH 4380 only.

Six wiring options are described in this
section:

• Basic wiring. This does not start the

Þ shÞ nder automatically when the boat
ignition is switched on and it disables the
engine hours counter.

• Auto power wiring. This must be used

for the engine hours and fuel computer
options.

• Secondary Alarm wiring

• NMEA wiring

• Single engine fuel wiring

• Twin engine fuel wiring

Note: If a wire colour is not specifically
mentioned, it is not used in that wiring option.

Section 6-5 Systems of several instruments,
describes NMEA and NavBus.

6-4 Wiring Options

Power on the Þ shÞ nder manually whenever the
main switch is on.

Fuse

Red

Yellow

Black

Main
switch

12 V DC

Basic wiring

Basic wiring

This requires the FISH 4350 and FISH 4380 to
be powered on manually with the key.

Black wire: Connect this to the negative bat­tery terminal.

Red wire: Connect this to the positive battery
terminal after the main switch. Fit a 1 Amp fuse
as shown.

Yellow wire: Connect this to the black wire.
This disables the engine hours counter.

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Auto power option

Black wire: Connect this to the negative

battery terminal.
Red wire: Connect this to the positive battery

terminal after the main switch. Fit a 1 Amp fuse
as shown.

Yellow wire: To enable the engine hours
counter and fuel counter; and to start the
Þ shÞ nder automatically when the ignition is
turned on, connect the yellow wire to the ignition
system through a 1 Amp fuse.

Note: The Þ shÞ nder cannot be turned off while
the ignition is on.

NMEA wiring Option
(FISH 4380 only)

White Wire: Use this, if desired, to connect
the Þ shÞ nder to other NMEA instruments such
as Navman’s REPEAT 3100. (See section 6-5
Systems of several instruments.)

Secondary alarm wiring option
(FISH 4380 only)

Green Wire: Use this to connect a secondary
alarm indicator such as a flashing light or
external beeper with a built-in drive circuit.
See the Auto power wiring diagram.

If the external beeper or light requires more than
200 mA total, Þ t a relay. Consult your Navman
dealer for more advice.

Fuel kit wiring (FISH 4380 only)

See the Fuel Kit Installation Guide for
information about the fuel transducer cable.

Wire the power cable for Auto power (as
described in this section) to make sure the fuel
counter starts as soon as the engine starts.

For twin engine installation, a T-connector needs
to be installed on the fuel transducer cable.

Fuse

Fuse

White (NMEA out)

Green

External Beeper
or Light

Red

Yellow

Black

Main
switch

12 V DC

Ignition

switch

To ignition system

Auto power option

Through hull transducers

Through hull transducers are supplied wth ‘Y’ adapter cable for
connection of both transducers into top socket with blue nut.

Speed/Temperature through hull transducer

phono

8 pin

6-5 Systems of several instruments

Several Navman instruments can be connected
together to share data.

NMEA

NMEA is an industry standard for marine instru­ment connections. Data sent by one instrument
over an NMEA line can be read and displayed

REPEAT 3100:

Repeater for
depth, speed,
water temperature
and battery voltage. Accepts
NavBus or NMEA data inputs
from other instruments.

DEPTH 2100:

Depth Repeater

TRACKER 5500:
Colour GPS
Chartplotter with
worldwide coverage

by another instrument that accepts NMEA 0183
Version 2. It requires dedicated connections be­tween instruments.

Please contact your Navman dealer for
information on Navman’s full range of NMEA
enabled instruments and connection options.

Through hull depth transducer

FISH 4350 / 4380 Installation and Operation Manual24

NAVMAN

6-6 Cleaning and maintenance

Clean the screen only with a damp cloth and mild
detergent when dirty or covered in sea salt. Avoid
abrasive cleaners, petrol or other solvents.

Cover or remove a transom-mounted
transducer when repainting the hull. If painting
over a through hull transducer with antifouling
paint, use only one coat of paint. Remove the
previous coat of antifouling paint by sanding it
lightly.To optimize performance, avoid walking

on or jamming cables and connectors. Keep the
transducer free of weed, paint and debris. Do not
use a high pressure water blast on a speed sensor
paddlewheel as it may damage the bearings.

When not in use, the FISH 4350 or FISH 4380
can be removed from the installation bracket and
stored in the Navman carry bag, or left on the
installation bracket and securely covered with
the sun cover.

Depth range

• 2 ft (0.6 m) to 600 ft (180 m).

Display type

• TFT Colour.

• Screen resolution 320 high x 240 wide

(pixels).

• LED multi-level backlighting.

Supply voltage

• 10 to 16 V DC.

Supply current at 13.8 V

• 300 mA min - no backlighting.

• 400 mA max - full backlighting.

Output power

• Variable, up to 200 W RMS.

Operating temperature

• 32° to 122°F (0° to 50°C)

Transom transducer cable length

• FISH 4350 33 ft (10 m).

• FISH 4380 26 ft (8 m).

Typical depth acquisition time from startup

• 2 seconds at 100 ft (30 m).

Receiver sensitivity

• Better than 10 micro volts RMS.

• Dynamic range 4.0 million to 1 (120 dB).

Temperature measurement range

Appendix A - SpeciÞ cations

New Zealand and Australia (C Tick)
AS-NZS 3548.

· Environment: IP67.

NMEA Output (FISH 4380 only)

NMEA 0183 (Ver 2.0) 4800 baud is a standard for
interfacing marine electronic devices. The Navman
Þ shÞ nder can output the following sentences:

• DBT (Depth Below Transducer)

• DPT (Depth and Keel offset)

• MTW (Water temperature)

• XDR (Battery voltage and fuel ß ow).

• VHW (Speed)

Fuel Computer (FISH 4380 only)

(optional fuel transducer(s) required)

• Outboard carburetted two stroke and EFI

petrol/gasoline engines: 30 to 300 hp.

• Outboard four stroke petrol/gasoline

engines: 90 to 300 hp.

• Inboard petrol/gasoline engines: 50 to 300 hp.

• Minimum ß ow rate: 1.3 U.S. gallons per

hour (5 litres per hour).

• Maximum ß ow rate: 34 U.S. gallons per

hour (130 litres per hour).

FISH 4350 and FISH 4380

5.0" (126.0 mm)

3.5" (88.5 mm)

1.1" (27.9 mm)

5.7" (143.5 mm)

5.0" (126.0 mm)

FISH 4350: 89 mm (3.5")

1.2" (30.5 mm)

FISH 4380: 97 mm (3.8")

• 32° to 99.9°F (0°

to 37.7°C)

Resolution of

0.1° unit.

Transducer
frequency

• 200 kHz.

Speed range

• 1 to 50 kn (57.5

mph, 96.6 kph).

Standards
Compliance

• EMC:USA FCC

Part 15 Class B.

Europe (CE)

EN50081-1 and
EN50082-1

FISH 4350 / 4380 Installation and Operation Manual 25

NAVMAN

This troubleshooting guide is written with
the assumption that the user has read and
understood the relevant sections in this manual.
It is possible in many cases to solve difÞ culties
without having to send the display unit back to
the manufacturer for repair. Please follow this
troubleshooting section before contacting the
nearest Navman dealer.
There are no user serviceable parts. Specialized
methods and testing equipment are required to
ensure that the display unit is reassembled
correctly and is waterproof. Users who service
the product themselves will void the warranty.
Repairs to the product may only be carried out
by a service centre approved by Navman. If the
product must be sent into a service centre for
repair, it is essential to send in the transducer(s)
at the same time.
More information can be found on our Website:
www.navman.com.

1. The Þ shÞ nder won’t turn on:

a) The FISH 4350 and FISH 4380 are

designed to operate on a 12 volt battery
system, where the voltage may vary from
10 to 16.5 volts. If an excessive voltage is
supplied, a resettable fuse will be tripped,
turning the display unit off.

b) Check that the power cable connector at the

back of the display unit is securely plugged
in and the collar is locked in place. The collar
must be secure for watertight connection.

c) Measure the battery voltage while the battery

is under load - turn on some lights, radio or
other electrical equipment connected to the
battery. If the voltage is less than 10 volts:

- the battery terminals or wiring on the
terminals may be corroded.

- the battery may not be charging
correctly or may need replacing.

d) Inspect the power cable from end to

end for damage such as cuts, breaks,
squashed or trapped sections.

e) Ensure that the red wire is connected to the

positive battery terminal and the black wire to
the negative battery terminal. If wired for the
Auto Power option, ensure the yellow wire is
connected to the ignition circuit. Also check
the boat’s main switch circuit (see section
6-5 Wiring options).

f) Check for corrosion on the power cable

connector and clean or replace if required.

g) Check fuses that are placed in line with the

power cable. A fuse can be blown despite

Appendix B - Troubleshooting

appearing to be good or the fuse may be
corroded. Test the fuse or replace it with a
fuse known to be good.

2. The Þ shÞ nder won’t turn off:

The Þ shÞ nder may have been wired for

Auto power. In this case, the fishfinder
cannot be turned off while the ignition power
is on. (See Auto power wiring in section 6-4
Wiring options.)

3. The Þ shÞ nder operates erratically:

a) Check that the transducer does not have

debris (e.g. weed, plastic bag) caught
around it.

b) The transducer may have been damaged

during launching, running aground or
while underway with debris etc. If the
transducer has been impacted, it may have
been kicked up on the bracket. If it is not
physically damaged, reset the transducer
back to its original position. (See the
Transom Transducer Installation Guide.)

c) When the transducer is less that 2 ft (0.6 m)

from the bottom, the depth readings may
become inconsistent and erratic.

d) Manual Gain may be set too low, which may

cause weak bottom echo or no Þ sh signals.
If in Manual Gain, try increasing the Gain.

e) Ensure the back of the bottom surface of the

transducer is slightly lower than the front and
the front is as deep in the water as possible in
order to minimize the generation of bubbles
through cavitation. (See the Transom
Transducers Installation Guide.)

f) Check the transducer and power cable

connectors at the back of the display unit
are securely plugged in and the collars are
locked in place. The collars must be secure
for watertight connection.

g) Inspect the power cable from end to end for

damage such as cuts, breaks, squashed or
trapped sections.

h) Ensure there is not another fishfinder

or depth sounder turned on, which may
interfere with this Þ shÞ nder.

i) Electrical noise from the boat’s engine

or an accessory may be interfering with
the transducer(s) and/or the Navman
Þ shÞ nder. This may cause the Þ shÞ nder
to automatically decrease the Gain unless
using Manual Gain.

The fishfinder thus eliminates weaker

signals such as Þ sh or even the bottom
from the display. This may be checked by

FISH 4350 / 4380 Installation and Operation Manual26

NAVMAN

switching off other instruments, accessories
(e.g. bilge pump) and the motor until the
offending device is located. To stop
problems from electrical noise, try:

- re-routing the power and transducer
cable(s) away from the boat’s other
electrical wiring.

- routing the display unit’s power cable
directly to the battery with an in-line fuse.

4. Bottom is not displayed:

a) The Þ shÞ nder may have Manual Range

selected and the depth may be outside the
range value selected. Either change the
Þ shÞ nder to Auto Range or select another
depth range (see section 4-4 Range).

b) The depth may be outside the Þ shÞ nder’s

range. While in Auto Range, the display
unit will display “--.-” to indicate that there is
no bottom detected. A display of the bottom
should reappear when in shallower water.

5. The bottom is displayed too far up
the screen:

The Þ shÞ nder may have Manual Range

selected and the selected Range value is
too high for the depth. Either change the
Þ shÞ nder to Auto Range or select another
depth range (see section 4-4 Range).

6. Bottom echo disappears or erratic
digital reading while the boat is moving:

a) Ensure the back of the bottom surface

of the transducer is slightly lower than
the front and the front is as deep in the
water as possible in order to minimise the
generation of bubbles through cavitation.
(See the Transom Transducers Installation
Guide, for more information.)

b) The transducer may be in turbulent water.

Air bubbles in the water disrupt the echoes
returned, interfering with the Þ shÞ nder’s
ability to Þ nd the bottom or other targets.
This often happens when the boat is
reversed. The transducer must be mounted
in a smooth ß ow of water in order for the
Þ shÞ nder to work at all boat speeds.

c) Electrical noise from the boat’s motor

can interfere with the Þ shÞ nder. Try some
suppression spark plugs.

7. If the Þ shÞ nder beeps when turned on
but nothing is displayed:

The Þ shÞ nder may be operating, but the

backlight settings may have been set too
low. See section 2 Basic Operation, to adjust

the Þ shÞ nder backlight. (Press

twice)

8. The wrong language is displayed:

See section 3-1 Setup > System.

9. Fuel used or remaining seem inaccurate:

a) If the engine is run while the Þ shÞ nder is

powered off, the Þ shÞ nder does not record
the amount of fuel used during that engine
run. Consequently, the Fuel remaining
value will be higher than the actual amount
of fuel remaining in the tank.

To avoid this problem, use the Auto Power

Wiring option described in section 6-4 Wiring
options. This ensures that the fishfinder
powers on automatically whenever the
boat’s ignition is switched on.

b) In rough seas, fuel may surge back and

forth through the fuel transducer, resulting in
incorrect readings. Try installing a one-way
valve between the fuel transducer and the
fuel tank.

c) The Set remaining fuel value must be

reset after every refuelling (see section 3-3
Setup > Fuel).

d) The fuel tank may not reÞ ll to the same

capacity each time due to air pockets. This is
particularly noticable with underß oor tanks.

e) Fuel transducers wear out over time and

should be replaced after every 5000 litres
of fuel.

10. Flow indicates no fuel or low fuel:

a) Check that the number of engines is set

to 1. See section 3-3 Setup > Fuel.

b) Check that the fuel cable connectors are

securely plugged in and the collar is locked
in place. The collar must be locked in place
to give a watertight connection.

c) A fuel transducer may be clogged. If so,

remove the transducer from the fuel line
and gently blow through it in the opposite
direction to the fuel ß ow.

A fuel Þ lter between the fuel transducer

and the fuel tank must be installed as per
the fuel installation guide. Failure to do so
will void the warranty.

d) Inspect the fuel cable from end to end for

damage such as cuts, breaks, trapped or
squashed sections.

e) Check that the fuel Þ lter is clean.

11. A twin engine installation shows only
one ß ow rate:

a) Check that the number of engines is set

to 2. See section 3-3 Setup > Fuel.

FISH 4350 / 4380 Installation and Operation Manual 27

NAVMAN

12. Erratic Fuel Flow readings:

a) The fuel ß ow transducer may have been

mounted too close to the fuel pump or may
be subject to excessive vibration. Refer to
the installation instructions supplied with the
fuel transducer.

b) Check for leaks in the fuel line or in the fuel

pickup in the tank.

c) The Flow Þ lter value is not suitable for the

engine. Check that the value is not set to zero,
then try increasing the value until a steady ß ow
rate is shown. See section 3-3 Setup > Fuel.

13. There is no reading for fuel economy:

a) The boat must be travelling through the

water to generate an Economy reading.

b) Check that the paddlewheel on the transducer

is spinning freely and that the two magnets in
the paddlewheel are still in place.

14. There is a double bottom trace
displayed:

a) The boat may be in an area that

generates shadows. See section 4-1
Interpreting the display.

b) In shallow water, the echoes may bounce.

Reduce the gain setting (see section 4-3
Gain).

c) Decrease the Range.

FISH 4350 / 4380 Installation and Operation Manual90

NAVMAN

Appendix D - How to contact us www.navman.com.

NORTH AMERICA

Navman USA Inc.
30 Sudbury Rd, Acton, MA

01720.
Toll Free: [phone]
Fax: [phone]
e-mail:
[e-mail]
web: www.navman.com

AUSTRALIA

Navman Australia Pty. Limited
Unit 2 / 5-13 Parsons St.
Rozelle, NSW 2039, Australia.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]
web: www.navman.com

OCEANIA
New Zealand

Absolute Marine Ltd.
Unit B, 138 Harris Road,
East Tamaki, Auckland.
Ph: [phone]
Fax: [phone]
e-mail: navman@absolutema
rine.co.nz

Papua New Guinea

Lohberger Engineering,
Lawes Road, Konedobu.
PO Box 810, Port Moresby.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]
web: www.lohberger.com.pg

SOUTH AMERICA
Argentina

Costanera Uno S.A.
Av Pte Ramón S. Castillo y
Calle 13
Zip 1425 Buenos Aires,
Argentina.
Ph: [phone]
Fax [phone]
e-mail: purchase@costanerau
no.com.ar
web: www.costanerauno.ar

Brazil

Equinautic Com Imp Exp de
Equip Nauticos Ltda.
Rua Ernesto Paiva, 139
Clube dos Jangadeiros
Porto Alegre - RS - Brasil
CEP: 91900-200.
Ph: [phone]

[phone]
Fax: [phone]
e-mail: equinautic@equinaut
ic.com.br
web: www.equinautic.com.br

Realmarine
Estrada do Joa 3862,
Barra da Tijuca, Rio de Janeiro,
Brazil. CEP: 22611-020.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]
web: www.realmarine.com.br

Chile

Equimar
Manuel Rodrigurez 27
Santiago, Chile.
Ph: [phone]
Fax [phone]
e-mail:
[e-mail]

Mera Vennik
Colon 1148, Talcahuano,
4262798, Chile.
Ph: [phone]
Fax [phone]
e-mail: meravennik@entel.
chile.net

CENTRAL AMERICA
Mexico

Mercury Marine de Mexico
Anastacio Bustamente #76
Interior 6 Colonia Francisco

Zarabia, Zapapan, Jalisco, C.P.
45236 Mexico.
Ph: [phone]
Fax: [phone]
web: www.equinautic.com.br

ASIA
China

Peaceful Marine Electronics
Co. Ltd.
Guangzhou, Hong Kong,
Dalian, Qingdao, Shanghai
1701 Yanjiang Building
195 Yan Jiang Zhong Rd.
510115
Guangzhou, China.
Ph: [phone]
Fax: [phone]
e-mail: sales@peaceful­marine.com
web: www.peaceful­marine.com

India

Access India Overseas Pvt. Ltd.
A-98, Sector 21,
Noida - 201 301, India.
Ph: [phone]
TeleFax: [phone]
Mobile: [phone]
e-mail:
[e-mail]

Esmario Export Enterprises
Block No. F-1, 3rd Floor, Surya
Towers
Sardar Patel Rd, Secunderbad
500 003.
Ph: [phone]
Fax: [phone]
e-mail:
[e-mail]
web: www.esmario.com

Indonesia

Polytech Nusantara,
Graha Paramita 2nd Floor,
Jln Denpasar Raya Blok D2
Kav 8 Kuningan, Jakarta

12940.
Ph: [phone]
Fax: [phone]
e-mail:
[e-mail]

Korea

Kumhomarine Technology
Co. Ltd.
#604-842,2F,1118-15,
Janglim1-Dong,
Saha-Gu, Busan, Korea.
Ph: [phone]
Fax: [phone]
e-mail:
[e-mail]
web: www.kumhomarine.com

Maldives

Maizan Electronics Pte. Ltd.
Henveyru, 08 Sosunmagu.
Male', Maldives.
Mobile: [phone]
Ph: [phone]
Fax: [phone]
e-mail:
[e-mail]

Singapore, Malaysia, Brunei,
Indonesia and Phillipines

RIQ PTE Ltd.
Blk 3007, 81 Ubi Road 1, #02­440, Singapore 408701.
Ph: [phone]
Fax : [phone]
e-mail: [e-mail]

Taiwan

SeaÞ rst International Corpora-
tion
No. 281, Hou-An Road, Chien­Chen Dist. Kaohsiung, Taiwan
R.O.C.
Ph: [phone]
Fax: [phone]
e-mail: seaÞ [e-mail]

web: www.seaÞ rst.com.tw

Thailand

Thong Electronics (Thailand)
Co. Ltd.
923/588 Ta Prong Road, Ma­hachai, Muang, Samutsakhon
74000, Thailand.
Ph: [phone]
Fax: [phone]
e-mail: sales@thongelectro
nics.com

[e-mail]
m
web:
www.thongelectronics.com

Vietnam

Haidang Co. Ltd.
1763 Le Hong Phong St.
Ward 12
District 10, Ho Chi Minh City.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]
web: www.haidangvn.com

MIDDLE EAST
Lebanon and Syria

Balco Stores
Balco Building, Moutran Street,
Tripoli (via Beirut). - Lebanon
P.O. Box: 622.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]

United Arab Emirates
Kuwait, Oman, Iran, Saudi
Arabia, Bahrain & Qatar

Abdullah Moh’d Ibrahim Trad­ing, opp Creak Rd. Baniyas
Road, Dubai.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]

AFRICA
South Africa

Pertec (Pty) Ltd (Coastal
Division)
16 Paarden Eiland Road.
Paarden Eiland, 7405
PO Box 527,
Paarden Eiland, 7420
Cape Town, South Africa.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]
web: www.pertec.co.za

EUROPE
France, Belgium and
Switzerland

Plastimo SA
15, rue Ingénieur Verrière,
BP435,
56325 Lorient Cedex.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]
web: www.plastimo.fr

Germany

Navimo Deutschland
15, rue Ingénieur Verrière
BP435- 56325 Lorient Cedex.
Ph: [phone]

[phone]

[phone]
Fax: [phone]
e-mail: plastimo.international@
plastimo.fr
website: www.plastimo.de

Italy

Navimo Italia
Nuova Rade spa, Via del
Pontasso 5
16015 Casella Scrivia (GE).
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]
web: www.plastimo.it

Holland

Navimo Holland
Industrieweg 4,
2871 JE Schoonhoven.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]
web: www.plastimo.nl

United Kingdom

Navimo UK
Hamilton Business Park
Bailey Road, Hedge End
Southhampton, Hants S030
2HE.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]
web: www.plastimo.co.uk

Sweden, Denmark, Finland
and Norway

Navimo Nordic
Lundenvägen 2,
473 21 Henån.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]
web: www.plastimo.se

Spain

Navimo España
Avenida Narcís Monturiol, 17
08339 Vilassar de Dalt,
Barcelona.
Ph: [phone]
Fax: [phone]
e-mail: [e-mail]
web: www.plastimo.es

Portugal

Navimo Portugal
Avenida de India N°40
1300-299 Lisbon.
Ph: [phone]
Fax: [phone]
e-mail: plastimo@siroco­nautica.pt
web: www.plastimo.com

Other countries in Europe

Plastimo International
15, rue Ingénieur Verrière BP435
56325 Lorient Cedex, France.
Ph: [phone]
Fax: [phone]
e-mail:
plastimo.international@plas
timo.fr
web: www.plastimo.com

REST OF WORLD/
MANUFACTURERS

Navman NZ Limited
13-17 Kawana St.
Northcote.
P.O. Box 68 155,
Newton,
Auckland,
New Zealand.
Ph: [phone]
Fax: [phone]
e-mail:
[e-mail]
web: www.navman.com

.

Lon 174° 44.535’E

Lat 36° 48.404’S

Made in New Zealand
MN000240B

NAVMAN

FISH 4350 and FISH 4380