• This manual has been authored with simplified grammar, to meet the needs of international
users.
• The operator of this equipment must read and follow the descriptions in this manual. Wrong
operation or maintenance can cancel the warranty or cause injury.
• Do not copy any part of this manual without written permission from FURUNO.
• If this manual is lost or worn, contact your dealer about replacement.
• The contents of this manual and equipment specifications can change without notice.
• The example screens (or illustrations) shown in this manual can be different from the screens
you see on your display. The screens you see depend on your system configuration and
equipment settings.
• Save this manual for future reference.
• Any modification of the equipment (including software) by persons not authorized by FURUNO
will cancel the warranty.
• All brand and product names are trademarks, registered trademarks or service marks of their
respective holders.
How to discard this product
Discard this product according to local regulations for the disposal of industrial waste. For disposal
in the USA, see the homepage of the Electronics Industries Alliance (http://www.eiae.org/) for the
correct method of disposal.
How to discard a used battery
Some FURUNO products have a battery(ies). To see if your product has a battery, see the chapter
on Maintenance. Follow the instructions below if a battery is used. Tape the + and - terminals of
battery before disposal to prevent fire, heat generation caused by short circuit.
In the European Union
The crossed-out trash can symbol indicates that all types of batteries
must not be discarded in standard trash, or at a trash site. Take the
used batteries to a battery collection site according to your national
legislation and the Batteries Directive 2006/66/EU.
In the USA
The Mobius loop symbol (three chasing arrows) indicates that Ni-Cd
and lead-acid rechargeable batteries must be recycled. Take the used
batteries to a battery collection site according to local laws.
PbNi-Cd
In the other countries
There are no international standards for the battery recycle symbol. The number of symbols can
increase when the other countries make their own recycle symbols in the future.
i
SAFETY INSTRUCTIONS
NOTICENOTICE
Observe the following compass safe
distances to prevent interference to a
magnetic compass:
Standard
Compass
Steering
Compass
Mandatory Action
Prohibitive Action
WARNING
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided,
can result in minor or moderate injury.
Warning, Caution
pqp
FI-70
IF-NMEAFI
0.30 m
0.30 m
0.30 m
0.30 m
WARNING
Do not open the equipment.
Only qualified personnel should
work inside the equipment. There are
no servicable or replacable parts inside
the equipment.
Do not disassemble or modify
the equipment.
Fire or electrical shock can result if
the equipment is modified.
Do not operate the equipment
with wet hands.
Electrical shock can result.
Safety instructions for the operator
Make sure no rain or water
splash leaks into the equipment.
Fire or electrical shock can result
if water leaks into the equipment.
Immediately turn off the power
at the switchboard if water leaks
into the equipment.
Continued use of the equipment
can cause fire or electrical shock.
Safety instructions for the installer
WARNING
Turn off the power at the switchboard before beginning the
installation.
Turn off the power to prevent
electrical shock.
Make sure the installation site is
not subject to water spray.
Fire or electrical shock can result if
water leaks into the equipment.
About the TFT LCD
The TFT LCD is constructed using the latest
LCD techniques, and displays 99.99% of its
pixels. The remaining 0.01% of the pixels
may drop out or blink, however this is not an
indication of malfunction.
ii
TABLE OF CONTENTS
FOREWORD.................................................................................................................... v
SYSTEM CONFIGURATION .......................................................................................... vi
EQUIPMENT LISTS....................................................................................................... vii
1.OPERATION AND CONTROLS OVERVIEW........................................................1-1
Congratulations on your choice of the FURUNO FI-70 Color Instrument. We are confident you will
see why the FURUNO name has become synonymous with quality and reliability.
Since 1948, FURUNO Electric Company has enjoyed an enviable reputation for quality marine
electronics equipment. This dedication to excellence is furthered by our extensive global network
of agents and dealers.
This equipment is designed and constructed to meet the rigorous demands of the marine
environment. However, no machine can perform its intended function unless operated and
maintained properly. Please carefully read and follow the recommended procedures for operation
and maintenance.
Thank you for considering and purchasing FURUNO equipment.
Features
By connecting the appropriate sensors, the FI-70 can provide various analog and digital
navigation and environmental data, via a digital data display, using a high quality, backlit LCD. The
sturdy, weather-proof case is built to stand up to even the harshest of environments.
The main features of the FI-70 are:
• Extensive navigational aid data, such as bearing, range, waypoints and current position, all on
one compact display.
• Easy to view LCD with multi colored display.
• Easy to operate interface with multi function keys.
• Able to display various alarms and alerts. (Requires appropriate sensors.)
• Designed for NavNet TZtouch2 compatibility.
• Up to three engines may have their various data displayed.
• Simplified AIS function allows up to 25 vessels to be displayed.
• CAN bus (NMEA2000) network compatible.
v
SYSTEM CONFIGURATION
Analog sensors
Tank gauge
Speed/Temp. Sensor
ST-02MSB/ST-02PSB
Wind Transducer FI-5001/L
CAN bus/NMEA2000 Backbone
Analog NMEA
Data Converter
IF-NMEAFI
T-connector
(option)
Terminal resistor*
(option)
Terminal resistor*
(option)
12 VDC
to
15 VDC
Color Instrument FI-70
(Maximum 11 units)
Multi Function Display
TZTL12F
or
TZTL15F
Junction Box
FI-5002
Junction Box
FI-5002
CAN bus/NMEA2000
sensors
CAN bus/NMEA2000
sensors
*: Terminal resistors
must be installed at
both ends of the
backbone.
+-
vi
EQUIPMENT LISTS
Standard Supply
NameTypeCode No.QtyRemarks
Color InstrumentFI-70-1Includes soft cover.
Installation MaterialsCP26-02000000-027-0461Contains CP26-02001 installation
materials.
Optional Supply
NameTypeCode No.Remarks
Analog NMEA
Data Converter
Wind
Transducer
Junction BoxFI-5002Front Mount KitOP26-29001-353-090
Installation
Materials
Cable
Assembly
NMEA
Connector
IF-NMEAFI-
FI-5001FI-5001L-
CP26-00300000-010-511For FI-5001, 30 m cable.
CP26-00400000-010-618For FI-5001, 50 m cable.
FI-50-CHAIN-0.3M001-105-820-10CAN bus/NMEA2000 connector.
The information shown in the display area varies depending on the category chosen
to be displayed.
KeyFunctions
Power/Brill keyTurn power on/off; open the [Brilliance] setting window.
Software keysGo back /forward one page; move the cursor; reduce/increase setting value.
Function keyConfirm selection; change displayed data (not available in some display
modes).
Key indicationsShow the operative function for the Software and Function keys. Press any
key to display the indicators. If there is no operation, the indicators are
minimized after a short period of time, however, they are always displayed
when a menu is open. The indications vary, depending on the displayed
screen/menu.
Menu/Back keyOpen main menu; return one level in the menu; cancel.
A
AWA
㻲㼡㼚㼏
㼡㼚㼏
º
50
Function key
㻺㼑㼤㼠㻼㼞㼑㼢
㼑㼤
Key
indications
Menu/Back
key
Right Software
key
1.2How to Turn the Power On/Off
The FI-70 turns on when the CAN bus/NMEA2000 network is powered. The FI-70 will
undergo a self-test, then display the last-used screen if the test is completed
satisfactorily.
Press and hold the Power/Brill key to turn the FI-70 off. The message "Turning OFF
in 3 seconds" is displayed. Hold the key for three seconds. Early release of the Power/Brill key will abort the shutdown. To turn the FI-70 on again, press the Power/Brill
key.
1-1
1. OPERATION AND CONTROLS OVERVIEW
Brilliance
Day ModeNight Mode
Press function
key to switch
between modes.
1.3How to Adjust the Screen Brilliance
Press the Power/Brill key to show the [Brilliance] setting
window. The software keys decrease or increase brilliance.
Pressing the Power/Brill key repeatedly cycles through the brilliance levels.
Press the function key to switch between Day and Night modes.
Note: When the FI-70 is subjected to undue heat, the brilliance may automatically
darken. This is designed to reduce heat stress and is not a malfunction.
1-2
1.4Menu Overview
Ent
Wind Speed
Wind Angle
Disp Config
Alarms
d
e
Category specific
menu items are
displayed above
the Main menu
items.
g
Alarms
Scrollbar:
Indicates there
are more menu
items to be
displayed. Press
the software keys
to move up or
down the menu.
Main menu starts
below the
category specific
menu items.
Wind Display:
True
0s(24.5kn)
1.0(24.5kn)
Wind
Damping
:
Adjust(W Speed):
Max TWS Alarm
Wind Speed
Ent
Sailboat
Engine Motor
Power Boat
8
Numerical
pop-up
Setting
options
pop-up
1.Press the Menu/Back key to display the main menu. The main menu contents
change according to the current category (See section 1.7 for more information on
categories). In the example below, the wind category is displayed.
2.Press the right software key to select the next item down in the menu, or press
the left software key to select the next item up in the menu. The menu item
currently selected is highlighted in blue. In the example above, [Wind Speed] is
selected.
Note: The key indications for the software keys are blank if there are no more options in that direction of the menu. In the above example, the menu has no options
in the up direction.
1. OPERATION AND CONTROLS OVERVIEW
Wind Spee
Wind Angl
Disp Confi
3.Press the function key to open the selected menu. For the purpose of this
example, the [Wind Speed] menu is opened.
4.Press the software keys to select the item you wish to adjust, then press the
function key. The setting options pop-up window is displayed.
5.Press the left software key to select the next item above your current selection,
or increase the value for the current selection.
Press the right software key to select the next item below your current selection,
or decrease the value for the current selection.
6.Press the function key to apply the changes, then press the Menu/Back key to
close the menu.
1-3
1. OPERATION AND CONTROLS OVERVIEW
Key Beep:
OFF
8
Stand Alone
A
Panel Dimmer:
Sharing:
Group:
System
Ent
Key Beep:
OFF
Stand Alone
Ent
A
Panel Dimmer:
Sharing:
Group:
System
8
Main menu items
The main menu has the following menu items which appear in all menus, regardless
of the category selected:
Menu itemDescription
[Alarms]Set alarms. (See section 6.3 for details on the [Alarm] menu.)
[Disp Config]Change the information displayed on each page.
(See section 1.7 for more information.)
[Alarm Log]Open the alarm log. (See section 6.3 for more information.)
[Sensor in Use]Displays a list showing the sensors currently set in the [Data
Source] menu.
[System]Change the FI-70 settings. (See chapter 4 for more information.)
For category specific menus, see the appropriate category in chapter 2.
1.5How to Turn Key Beeps On/Off
1.Press the Menu/Back key to open the main menu.
2.Press the right software key to scroll down
the menu and select [System], then press
the function key.
3.[Key Beep] is already selected, press the
function key.
4.Press the software keys to select [ON] or
[OFF], as appropriate, then press the
function key to apply the setting.
5.Press the Menu/Back key to close the menu.
1.6How to Adjust the Panel Dimmer (Control Key
Panel Backlights)
1.Press the Menu/Back key to open the main menu.
2.Press the software keys to scroll down the
menu and select [System], then press the
function key.
3.Press the software keys to scroll through
the menu and select [Panel Dimmer], then
press the function key.
1-4
4.Press the software keys to adjust the dim-
mer as appropriate, then press the function
key to apply the setting.
5.Press the Menu/Back key to close the menu.
1. OPERATION AND CONTROLS OVERVIEW
Rudder
P
30
º
DepthDepth
45004500
44004400
43004300
1010202030min30min
ftft
43034303
x1000
RPM
3280
Eng. Temp.
125.6
CompassSpeedEngine
Wind
Rudder
Graphs
AIS
Highway
Custom data box
Timers
OFF
N UP
NM
N
STW
kn
1015
20
17.8
SOG
50
º
AWA
A
WAYPOINT
XTE
NM
0.05
P
Time
Trip
00:
00:
00:00
0
15:00
NM
348
º
T
HDG
Depth
POSN
34º37.145’N34º37.145’N
75º29.108’W75º29.108’W
38553855
COG M
345345
SOG
42.542.5
º
W Temp.
6565
º
kn
ft
F
1.7Screen Categories and Page Setup
The FI-70 can display the information categories shown in the figures below, provided
a sensor for the appropriate information is connected.
1-5
1. OPERATION AND CONTROLS OVERVIEW
1
3
4
6
1.7.1How to change the displayed page
The FI-70 can display up to seven different pages of information. Use the software
keys to change pages backwards and forwards between the pages.
The number of the current page is displayed as a large numeral in the center of the
screen for three seconds after the page is displayed.
Pages with no display information selected are skipped. In the example below, no
information is selected to be displayed on pages 2, 5 or 7.
Pressing the right software key will display, in order, Engine Compass Speed Wind direction Engine, while pressing the left software key will display the pages
in reverse order.
x1000
1
EntNextPrev
Engine
Page 1
Eng. Temp.
125.6
RPM
3280
Not set
Page 7
Not set
Page 2
A
AWA
º
50
6
EntNextPrev
Wind direction
Page 6
Not set
Page 5
10
4
Speed
Page 4
STW
EntNextPrev
15
20
SOG
17.8
3
EntNextPrev
Compass
Page 3
kn
1-6
1.7.2How to set up pages
50
º
AWA
T
Select a page to setup.
EntNextPrev
The FI-70 is capable of displaying seven pages of category information.
The procedure below outlines how to set up a page.
1.Press the Menu/Back key to display the main menu.
2.Press the right software key to scroll down the menu and highlight [Disp Config],
then press the function key.
1. OPERATION AND CONTROLS OVERVIEW
3.Press the software keys to select the appropriate page. The page number is
displayed at the center of the screen for three seconds after each page change.
4.Press the function key to display the category selection screen.
Select screen category.
AIS
l0
:00
12
㻺㼑㼤㼠
A
AWA
º
NM
50
Wind
Ent
5.Press the software keys to select the appropriate category to display, then press
the function key. The current selection is highlighted with a blue box.
6.Press the function key to set the selected category (and screen if applicable) for
the selected page. Some categories have several display screens available. See
chapter 2 for further details on available screens for the selected category.
7.If the category selected at step 5 was [Graph], set the graph data display as
follows:
1) Press the software keys to select [1Graph] or [2Graphs] as appropriate, then
press the function key. For this example, [2Graphs] is chosen.
2) Press the software keys to select the graph to setup, then press the function
key.
Select Graph
Graph1:Depth
Graph2:
Done
A. Temp
1-7
1. OPERATION AND CONTROLS OVERVIEW
3) Press the software keys to select the appropriate data to display, then press
the function key.
Depth
W Temp.
A Temp.
A Press.
Depth is shown on graph
Water temperature is shown on graph
Atmospheric temperature is shown on graph
Atmospheric pressure is shown on graph
4) Repeat steps 2) and 3) for the second graph.
5) Press the right software key to select [Done], then press the function key to
apply the changes.
6) Press the Menu/Back key once to close the menu.
8.Press the Menu/Back key to exit the [Display Config] menu.
1-8
2.DISPLAY CATEGORIES AND
348
º
T
HDG
Press the
function key
to change
data
displayed
Compass needle
Heading reference
T: True
M: Magnetic
CATEGORY SPECIFIC MENUS
This chapter explains the various menu operations and on-screen indications for each
display category.
Depending on the data currently selected to be displayed, the analog and digital data
displayed on-screen may differ.
2.1Compass Category
The compass needle indicates the current heading in this category. The compass
scale rotates to show the heading as you turn the ship.
Press the function key to cycle through the following data on the Compass display:
Displayable dataDescription
HDGDisplays the current heading.
HDG Avg.*Displays the average heading.
HDG TackDisplays the projected heading on next tack.
*: The average is calculated from when the FI-70 is turned on. All calculations are
reset when the power is turned off.
2-1
2. DISPLAY CATEGORIES AND CATEGORY SPECIFIC MENUS
STW
Press the
function key
to change
data displayed
kn
0
5
1015
20
17.8
SOG
SOG
kn
0
5
1015
20
17.8
STW
Speed Thru Water (STW) screenSpeed Over Ground (SOG) screen
Current speed
2.2Speed Category
This category displays the ship speed data on the needle meter. When there is no
speed data input to the FI-70, the current speed indicator (needle) is not displayed.
The Speed category has two available screens: STW and SOG. See "How to set up
pages" on page 1-7 to set the screens.
Press the function key to cycle through the following data on the Speed display:
Displayable dataDescription
STWDisplays Speed Through Water (STW).
STW Max*Displays maximum STW.
STW Avg.*Displays average STW.
SOGDisplays Speed Over Ground (SOG).
SOG Max*Displays maximum SOG.
SOG Avg.*Displays average SOG.
VMGDisplays Velocity Made Good (VMG).
Note: VMG is unavailable in SOG mode.
*: The average and maximum values are calculated from when the FI-70 is turned on.
All calculations for average and maximum are reset when the power is turned off.
2-2
2. DISPLAY CATEGORIES AND CATEGORY SPECIFIC MENUS
Currently selected gear is highlighted.
F: Forward, N: Neutral, R: Reverse
x1000
RPM
3280
Eng. Temp.
125.6
NOTE: Data shown in the engine category is input from engine sensors. Always check any
malfunction at the engine, do not rely solely on the FI-70 indications.
NOTE: Data shown in the engine category is input from engine sensors. Always check any
malfunction at the engine, do not rely solely on the FI-70 indications.
Two engine display
Eng. Temp. ºF
x1000x1000
26003320
136
°F
-16
°F
Three engine display
Eng. Temp. ºF
RPM
135025003530
293193-13
1
1
1
1
2
2
3
4
4
3
Engine RPM
Status indications
Press function key to
change data displayed.
2.3Engine Category
This category displays various engine information for up to three engines.
For details on engine status indicators, see "Engine Error Icons" on page 6-4.
Press the function key to cycle through the following data on the Engine display:
Displayable dataDescription
Eng. Temp.Displays the engine temperature.
Fuel UsedDisplays the amount of fuel used.
Fuel RateDisplays the consumption rate of fuel.
BoostDisplays the boost psi.
Eng. HourDisplays the engine hours.
Oil Press.Displays the oil pressure.
Oil Temp.Displays the oil temperature.
Coolant PDisplays the coolant pressure.
E LoadDisplays the engine load.
Gear Oil TDisplays the gear oil temperature.
Gear Oil PDisplays the gear oil pressure.
2-3
2. DISPLAY CATEGORIES AND CATEGORY SPECIFIC MENUS
DepthDepth
45004500
44004400
43004300
1010202030min30min
ftft
43034303
44004400
10001000
990990
43004300
DepthDepth
ftft
42564256
A Press.A Press.
hPahPa
10031003
1010202030min30min
30min30min
1010
2020
44004400
10001000
990990
43004300
DepthDepth
ftft
42564256
A PressA Press
HPaHPa
10031003
1010202030min30min
60min60min3030
Ent
Depth Graph
A Press Graph
Disp Config
Alarms
2.4Graph Category
The graph category displays preselected sensor data in graph format. Up to two
graphs can be displayed simultaneously. The following data may be selected for
display in graph format.
• Depth
• W Temp. (Water temperature)
The menu items displayed for the Graph category are dependent on the currently
graphed items. In the above right example, the menu will display [Depth Graph] and
[A Press Graph]. To adjust the graphed interval and range, see the procedure below.
To set the graph data to be displayed, see "How to set up pages" on page 1-7.
• A Temp. (Atmospheric temperature)
• A Press. (Atmospheric pressure)
How to adjust the graphed interval and range
The graphed interval and range may be adjusted for all graphs.
1.With the [Graph] page displayed, press the Menu/Back key.
2-4
2.Press the software keys to select the graph to adjust, then press the function
key.
3.Press the software keys to select the appropriate variable to change.
[Period]: Adjusts the graphed interval.
[Range]: Adjusts the graphed range.
4.Using the software keys, adjust the [Period] and [Range] appropriately. Press the
function key to save the adjustments.
5.Press the Menu/Back key to close the menu.
2. DISPLAY CATEGORIES AND CATEGORY SPECIFIC MENUS
WAYPOINT
XTE
MN
0.05
P
Press the function
key to change data
displayed.
Destination/Waypoint name
Destination/Waypoint
mark
Own ship mark
Rudder
P
30
º
2.5Highway Category
The highway display provides a graphic presentation of your boat’s track along
the intended course, toward a waypoint.
Press the function key to cycle through the following data on the Highway display:
Displayable dataDescription
XTEDisplays the XTE (Cross Track Error).
WPTDisplays the co-ordinates for the next waypoint.
RNGDisplays the distance to the next waypoint.
BRGDisplays the current bearing.
There is no category specific menu for this category.
2.6Rudder Category
The Rudder category shows the current rudder angle, along with the indicators "P" for
port and "S" for starboard.
This category has no specific menus and the function key has no function.
2-5
2. DISPLAY CATEGORIES AND CATEGORY SPECIFIC MENUS
Time
Trip
00:
00:
00:00
0
00:00
NM
Lap
Time
Trip
00:
00:
00:00
0
15:00
NM
Time
00:
00:00
15:00
Lap
00:
Countdown Timer1
Countup Timer
Countdown Timer2
2
3
3
1
2
1
2
4
3
1
2
4
Trip meter
Countdown Timer
Lap time
Countup Timer
2.7Timer Category
The Timer category has three available timers to select from, as indicated in the figure
above. To select the desired timer, see "How to set up pages" on page 1-7.
[Countdown Timer1] and [Countdown Timer2] both have a maximum time of 15 minutes. The [Trip] indicator on [Countdown Timer2] and on the [Countup Timer] keeps
track of the distance traveled (requires appropriate sensors).
Note: All timers are paused and the normal display indications are restored if the
Menu/Back key is pressed with any timer open.
2.7.1How to use the timers
With the timer screen displayed, press the function key to show the [Func] key
indications. Press the function key again to start the selected timer.
The [Countdown Timer2] and [Countup] timer begin to measure distance.
With the timer active, press the right software key to record a lap time. Press the left
software key to reset the timer to nearest minute.
Press the function key at any time to stop the timer. The Menu/Back key may also
be used to stop the timer.
With the timer stopped, press the right software key to reset the times (counter and
lap) and distance.
To restart the timer, press the function key.
2-6
2. DISPLAY CATEGORIES AND CATEGORY SPECIFIC MENUS
Time
Trip
00:
00:
00:00
0
15:00
NM
Time flashes to indicate it
is changeable
2.7.2How to adjust the timers
1.With the timer screen displayed, press the function key to show the [Func] key
indications.
The left software key indication
is blank for the [Countup] timer.
Note: The [Countup] timer does not require setup. When using the [Countup]
timer, skip to step 4.
2.Press the left software key to open the [Setup] window. The time will flash,
indicating it can be changed.
StartResetSetup
3.Press the software keys to decrease or increase the time, then press the func-
tion key to apply the changes.
4.Press the function key to start the timer.
2-7
2. DISPLAY CATEGORIES AND CATEGORY SPECIFIC MENUS
Wind AngleGround WindCh Wind
50
º
AWA
A
1
3
AWA
T
27
º
AWA
A
1
3
27
º
AWA
A
3
444
2
Wind Angle Ground Wind*
Data display Display mode
T: True
A: Apparent
1
34
2
*: Heading, AWA/AWS and ship speed data are required to display Ground Wind
2.8Wind Category
This category displays various wind data. There are three wind modes available, as
shown in the figure above.
Press the function key to cycle through the following data in the [Wind] category:
Displayable dataDescription
AWA* (Where [Wind Display] is set to
[Apparent])
AWS* (Where [Wind Display] is set to
[Apparent])
TWA* (Where [Wind Display] is set to
[True])
TWS* (Where [Wind Display] is set to
[True])
BeaufortDisplays wind strength in Beaufort units.
*: True Wind and Apparent Wind may be switched from the menu. See section 4.3 for
details. The average and maximum values are calculated from when the FI-70 is
turned on. All calculations for average and maximum are reset when the power is
turned off.
Displays Apparent Wind Angle (AWA).
Displays Apparent Wind Speed (AWS).
Displays True Wind Angle (TWA).
Displays True Wind Speed (TWS).
2-8
2.9AIS Category
H-UP
NM
N-UP
NM
N
Heading UpNorth Up
The AIS category displays basic AIS data such as bearing, range, lost and dangerous
targets. The maximum number of targets which may be displayed is 25, in order from
closest to farthest from own ship.
Range rings are fixed at 2 NM, 4 NM and 6 NM.
2. DISPLAY CATEGORIES AND CATEGORY SPECIFIC MENUS
There are two orientations available:
• [Heading Up] - Displays the targets and own ship with the heading oriented up-
wards.
• [North Up] - Displays the targets and own ship with North oriented upwards.
Note: The AIS category is a simplified AIS, with limited function and capacity. Only
Class A and Class B AIS targets are displayed. Do not rely solely on the FI-70
indications for information about nearby targets.
AIS symbols and their meanings
The AIS symbols displayed may change, depending on the target’s conditions, as
shown in the table below. The targets are displayed as a triangular symbol, with a line
extending from the triangle. The line indicates the estimated COG (Course Over
Ground) for the target and changes direction accordingly.
AIS SymbolMeaning
Activated target symbol.
Dangerous target symbol. Any targets entering the danger zone change to dangerous targets.
This symbol is displayed as a flashing symbol.
Lost target symbol. Targets whose data has been lost by
the AIS are displayed in this manner.
This symbol is displayed as a flashing symbol.
Uncertain target symbol. The CPA/TCPA for this target
cannot be calculated.
CPA is the Closest Point of Approach, TCPA is the Time
to Closest Point of Approach.
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