Thank you for purchasing a NAVMAN 400 series fishfinder. The 400 series is a powerful, yet easy
to use sonar fish and bottom depth detector. Please read this manual carefully before installing and
using your fishfinder. This manual deals with both the FISH400 and FISH440. The more you know
and understand about the capabilities of the unit, the better it will perform for you.
Specifications for 400 Series
Specifications
• Dimensions
132 mm W(max) x 133 mm H x 46 mm D
• Depth Capability
180 metres, 600 feet
• Transducer Type
Aquatic transom-mount single beam. Thru
hull transducer options are also available.
• Operating Frequency
200 KHz
• Transducer Angle
15 degrees
• Receiver Sensitivity
30 micro volts RMS
• Power Output
400 watts RMS (3200 watts peak-to-peak)
maintained within 10% down to 10.5 volts.
Additional FISH440 Specifications
• Boat Speed
0.0–50.0 kts, mph, kph user selectable
• Water Temperature
0.0–40.0°C (32.0–99.0°F) user selectable
Display is backlit for
Night Operation
NAVMAN
FISH400
• Display Size
100mm (4¼") Diagonal. 82 mm x 76 mm
(3¼" x 3")
• Display Type
STN temperature compensated
• Display Matrix
100 x 64 pixels
• Input Voltage
10 to 18 volts DC @ 150 mA max. (lights on)
• Backlighting
Even illumination. Seven levels plus off.
• Operation Temperature
0°C to 40°C ambient ( 32°F to 104°F )
• Log
Records up to 9999.9 nm, km, stored in
memory, resetable.
• Power Output
440 watts RMS (3500 watts peak to peak)
maintained within 10% down to 10.5 volts.
Active alarms indication
F=Fish, D=Deep, S=Shallow
Power On/Off
Menu Exit
Backlighting On/Off
Change Value Down
Alarms On/Off
Change Value Up
6NAVMAN Fishfinder User Manua l
Enter Menu Mode
Advance to Next Menu
MoveThrough Menu Items
Installation
Location
The FISH400 and FISH440 are water resistant
and may be mounted and operated in many
positions thanks to its compact and robust
bracket, associated with a swivel support.
Note
It may be advisable to install the
transducer and wiring before finalising
the location of the display head and
bracket.
35.0 (1.4")
When installing the display head, select a position
where it will be:
• at least 300 mm ( 12" ) away from the
compass.
• at least 300 mm ( 12" ) away from any
radio transmitter, such as the VHF.
• easy to read by the helmsman and crew
while under way.
• protected from physical damage during
rough sea passages.
• have easy access to the 12 volt power
source.
• convenient to route the transducer cables.
132.0 (5.2")
NAVMAN
FISH400
149.0 (5.9")
133.0 (5.2")
81.5 (3.2")
7NAVMAN Fishfinder User Man ual
Installation The Transducer
Read this section carefully before attempting
the transducer installation. Remember, the
transducer location is the most critical part
of the installation. If this is not done properly,
the transducer can’t perform at its designed
potential. Therefore the performance of the
fishfinder, especially at higher speeds, will not
be satisfactory.
• Transom Mount T ransducer
Location
The transducer can be installed on any outboard
or sterndrive powered boat. The transom mount
transducer has a safety “kick up” mounting
bracket to help minimise damage to the
transducer should it impact the bottom or floating
debris in the water.
Select a position for the transducer that will:
• allow the transducer a smooth flow of
water over its surface at all times.
• ensure a mount as deep in the water as
possible.
• be clear of any interference from the trailer
when launching or retrieving the boat.
• be away from planing strakes or other
projections from the hull that may cause
aerated water to flow over the face of the
transducer.
• be away from the propeller
• be at least 150 mm ( 6" ) away from the
keel of the boat.
Mounting
Once the best location of the transducer is
determined, hold the transducer and bracket
against the transom. The bottom surface of the
transducer needs to sit parallel to the surface of
the water for the best signal retur n. The lower
face of the transducer should extend down
below the bottom of the hull so that it will be
below the surface of the water at high speeds.
(See fig. 2.1)
fig. 2.1
Minimum
immersion
required
Mark the transom through the bracket slots to
correctly place the two outer screws. Now drill
the two holes in the centre of the slots. This will
allow you to adjust the transducer position later
on if required. Use two of the three stainless
screws supplied to attach the bracket to the
transom. Ensure the lower face of the transducer
is parallel with the ground (see fig. 3.1 and 3.2).
Tighten the two screws.
fig. 3.1
DEEP-“VEE”
HULL
Poor Location
Poor Angle
Good Location
8NAVMAN Fishfinder User Manua l
Good Location and Angle
fig. 3.2
FLAT-BOTTOM
HULL
Finally, drill a hole and insert the third screw in
Black
Black
Depth/Speed
Red
Red
2 pin Fuji
2 pin Fuji
8 pin Fuji
8 pin Fuji
Depth
Speed
F440 Y-Cable
the middle of the bracket. It is advisable to fill
holes with a sealing compound before inserting
screws (see fig. 3.3).
Wiring connection
Electrical protection
• Your fishfinder has an inter nal electrical
protection system for over voltage and
short circuit situations. It is not necessary
to use a fuse or a circuit breaker.
fig. 3.3
• Other Types of T ransducers
It is possible to use your NAVMAN Fish Finder
with all the NAVMAN Transducers Range
(including thru-hull mounting). For this purpose
you need to purchase the Y adaptors for the
FISH400 and FISH440, which will allow you to
separate the power cable from the transducer’s
cable.
Model FISH400
Red
4 pin Fuji
Black
Depth
If possible, route the transducer cable away from
other wiring on the boat. Electrical noise from
engine wiring, bilge pumps, and other equipment
can affect the display.
• Both the power and depth transducer
cables lead into one four pin connector on
the FISH400 or the eight pin connector on
the FISH440. This plugs into a single
socket in the rear of the instrument.
Connect the red wire of the two-core
power cable to the positive supply and the
black wire to the electrical ground. The
shortest and most direct connection to the
boat’s battery will help to eliminate any
problems due to voltage drop or electrical
interference.
4 pin Fuji
Red
F400 Adaptor Cable
Depth
Black
Model FISH440
9NAVMAN Fishfinder User Man ual
Operation
Introduction
The FISH400 and FISH440 use sonar
technology to display lake or seabed contours
and to detect fish. The system consists of an
LCD display unit and a depth transducer
positioned in the water. The model FISH440 is
also supplied with integrated boat speed and
water temperature sensors.
Primary functions and quick operation
introduction
Tur ns the power ON and OFF
• Press for one second to turn the
power ON
• Press and hold for three
seconds to turn the power OFF
Selects digital information to be
displayed in the top left corner of the
Fish Finder screen.
Returns the unit to operating mode
from any menu.
Tur ns the backlighting ON or OFF
• Press once to turn the backlights
ON
• Press again to turn the
backlights OFF
Decreases setting values in menus.
Tur ns the alarms ON or OFF
• Press once to turn the alarm ON
• Press again to turn the alarm
OFF
Increases setting values in menus.
The LCD screen is menu driven for ease of use.
The automatic detection can locate and display
the position of fish with three different size fish
symbols. This feature can be disabled so that
the LCD will display only the raw electronic
signals. Experienced users can use this mode
to extract even more information about the water
and seabed conditions.
Momentarily pressing the key
removes or displays depth, speed and
temperature data (depth only in the
FISH400) from the upper left corner of
the display. The format chosen is
retained in memory when the power
Note
is switched off.
Menu selection system
Your fishfinder has many features that may be
selected for adjustment. Each of these features
have a menu screen. You may access all the
menu screens by repeatedly pressing the
key.
Menus such as the manual gain control, shallow
and deep water alarms have additional numerical
control windows. The number in this window is
changed by using the V and ^ keys. Any
changes made are recorded in memory as soon
as you exit the menu screen. All changes are
stored in memory when the power is
switched off.
Note
To exit or clear any menu from
the screen, press the key.
∗
Enters menu mode
∗
Advances to the next menu
Moves through the list of items in each
menu
10NAVMAN Fishfinder User Manua l
Display and Operating Modes
The FISH400 has five modes of operation.
These are Echo, Echo + Analogue Scope,
AutoFish, AutoFish + Analogue Scope and
Navigate.
Echo mode
The Echo mode displays the return signals as
they are received from the transducer. Fish
appear as arches and not as fish symbols. The
length of the arch will indicate the relative size of
the return echo and size of the fish.
The Echo mode enables the unit to display
echoes caused by surface turbulence, thermal
layers, plankton or transducer noise when the
boat is moving. This mode is very useful for the
experienced user.
The digital display in this sample window is
indicating the depth of the bottom. The display
units are also user selectable
Autofish mode
The Autofish mode automatically analyses the
return echoes and displays echoes with fish
icons (the bigger the echoes, the bigger the
icon!).
The return echo is caused when the sonar beam
strikes the air stored in the fishes swim bladder.
Certain types of fish have larger swim bladders
than normal so the size of the icon is not always
a reliable way to indicate the relative size of the
fish.
In the Autofish mode, unnecessary surface
noise is reduced from the top of the screen. This
mode is recommended when your boat is moving
along at higher speeds.
11NAVMAN Fishfinder User Man ual
Analogue-scope function
Analogue Scope
Current Echo
The Analogue-scope function is available in
either the Echo or Autofish modes. This feature
displays an intensity graph of the current echoes
down the right hand side of the screen.
The information can be used to help determine
the type of bottom structure and the size of fish.
The strength of the echo is proportional to size
or number of pixels visible in the analogue
section of the screen. This feature will help to
determine the strength of the return echo from
the bottom and therefore how hard or soft the
bottom may be.
Model FISH400
Displays depth only
Model FISH440
Navigate Mode
In this mode the depth, speed and temperature
are displayed in large easily readable digits. This
is useful when navigating to your favourite fishing
location.
To increase precision, the values are displayed
in 0.1 increments.
12NAVMAN Fishfinder User Manua l
You may display water temperature in degrees
°C or °F. The depth of the bottom in feet, metres
or fathoms. The speed of the boat in mph, knots
or kph.
The log will display the total distance in the speed
unit you have selected. The log total is
automatically stored in memory when the power
is switched off or removed but this value can be
reset to zero (see SETUP menu).
When either or all of the Fish (F), Shallow (S) or
Deep (D) alarms are active they are displayed
at the top left corner of the screen.
Range function
Changing the mode of operation
• Press the ∗ key to activate the mode
menu
• Press either the key or the key to
move the pointer to the desired mode of
operation
• Press the key to accept the choice
and return to normal display mode
The symbols in the display box are as follows
Echo mode
The range function allows you to control the
depth range that is displayed on the LCD. There
are three different range modes; Top, Bottom,
and All.
If Top is selected then a lower depth limit value
must also be selected. This mode locks the
display to show only echoes from the surface of
the water down to the lower depth limit you have
selected. This means that the sea bed may not
be shown if the water is deeper than the selected
lower depth limit.
If Bottom is selected then an upper depth limit
must also be entered. This mode locks the
display to show only echoes between the sea
bed and the upper depth limit you have selected.
The top of the water may not be shown if the
water is deeper than the upper depth limit. This
feature is like a ZOOM function, as it allows you
to see the bottom contour and fish echoes above
the bottom in greater detail.
If All is selected then the unit will automatically
adjust the display range to show both the top of
the water and the sea bed no matter what the
depth of the water is.
Setting the display range
Depth Range Limit
• Press the ∗ key until the range menu is
displayed.
• Press either the key or the key to
move the pointer to the desired mode of
operation
13NAVMAN Fishfinder User Man ual
• If the desired mode is Top or Bottom then
use the V or the ^ key to adjust the limit
value to the desired level
• Press the key to accept the choice
and return to normal display
Gain function
The gain is a measure of ability to receive weak
signals. The higher the gain setting, the better
the unit is able to pick up weak return signals.
Deep water operation requires the gain to be
set to a higher value due to loss of signal in the
water.
There are two gain modes that can be selected,
Manual and Auto.
If Manual is selected then a gain setting from 0
to 15 must also be entered. This will be the
value of gain that is always used when displaying
information on the screen. A low gain number
may be suitable in shallow water but will need to
be increased for deep water operation
If Auto is selected then the gain will automatically
vary as the water depth changes. This feature
is particularly useful if you are fishing areas
where the depth changes suddenly. In Auto
mode, you can set the auto-gain value to provide
a consistent image of the bottom, regardless of
the bottom type. A low auto-gain setting will cause
a thin bottom image to be displayed. A high autogain setting will result in a thick bottom image.
This adjustment is particularly useful with a weak
return signal from a muddy or silty bottom.
Normally, in these conditions the auto-gain will
increase the gain to a level that may make the
display appear too cluttered, making it difficult to
distinguish fish. In this situation the auto-gain
can be reduced to display a weak bottom image
but with improved fish images.
Setting the gain
• Press the ∗ key until the gain menu is
displayed
• Press either the key or the key to
move the pointer to the desired mode of
operation
• If the desired mode is Manual then use the
V or the ^ key to adjust the value to the
desired level
• Press the key to accept the choice
and return to normal display mode
• If the desired mode is Auto then use the
V or the ^ key to adjust the value to the
desired level. In Auto mode the gain will be
controlled to show the same bottom detail
irregardless of depth
14NAVMAN Fishfinder User Manua l
Display scroll speed
The scroll speed is the speed that the picture
moves across the screen. It is adjustable in three
distinct steps, slow, medium and fast. In general
the faster scroll speed will work better with higher
boat speeds. The slower scroll speeds are more
suitable for slow speed trolling and slower
vessels. The most suitable scroll speed is
determined by experimentation
Setting the scroll speed
• Press the ∗ key until the speed menu is
displayed
• Press either the key or the key to
move the pointer to the desired scroll
speed
• Press the key to accept the choice
and return to normal display mode
15NAVMAN Fishfinder User Man ual
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