ICS Nav6plus User manual

Nav6plus User Guide
MAN 3008.00
Issue 2.0
ICS Electronics Limited.
Unit V, Rudford Industrial Estate
Ford, Arundel, West Sussex
BN18 0BD
United Kingdom
Tel: [phone]
Fax: [phone]
E-Mail: [e-mail]
[e-mail]
Website: www.icselectronics.co.uk
The technical data, information and illustrations contained in this publication
were to the best of our knowledge correct at the time of going to print. We
reserve the right to change specifications, equipment, installation and
maintenance instructions without notice as part of our policy of continuous
product development and improvement. No part of this publication may be
reproduced, stored in a retrieval system or transmitted in any form, electronic
or otherwise without permission in writing from ICS Electronics Ltd. No liability
can be accepted for any inaccuracies or omissions in the publication, although
every care has been taken to make it as complete and accurate as possible.
Copyright 2002, ICS Electronics Limited. All rights reserved.

Nav6 Plus Navtex System User Guide
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Important Information
This equipment is not approved for use by SOLAS convention
vessels within the Global Maritime Distress and Safety System
(GMDSS)
It is intended for use by leisure craft and other non-SOLAS
vessels wishing to participate within GMDSS
Safety Warnings
Do not use the sensor as a grab-handle
This instrument is for use as an aid to sailors and should not
lead to a reduction in the level of good seamanship required at
all times
Reception of messages cannot always be guaranteed as this
depends on local radio propagation
The correct magnetic variation must be input at the navigation
instruments (e.g. GPS, electronic compass) for the accurate
display of COG, set, waypoint bearing and heading.

Nav6 Plus Navtex System User Guide
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Contents
Quick Start......................................................................................5
Introduction.....................................................................................5
Nav6plus Features..........................................................................6
Advanced Operation..................................................................... 13
Navtex Mode ................................................................................ 13
Navigate Mode ............................................................................. 18
Setup Mode.................................................................................. 23
Alarm Operation............................................................................ 36
Printing Navtex And Navigation Log.............................................. 37
Output To A PC or Plotter............................................................. 38
Installation Of Sensor Unit ............................................................ 38
Installation Of Display Unit............................................................ 41
Testing The Nav6 After Installation................................................48
Maintenance and Trouble Shooting............................................... 48
Warranty....................................................................................... 50
Glossary ....................................................................................... 51
Packing List And Options.............................................................. 51
Specification................................................................................. 52
Appendix I: Navtex Station Database............................................ 54
Appendix II: Message Type Indicators........................................... 57
Appendix III: NMEA Sentences Supported.................................... 57
Appendix IV: Nav6 Menu Navigation............................................. 58
Appendix V: Nav6 Menu Structure ................................................ 59

Nav6 Plus Navtex System User Guide
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Congratulations on purchasing this superb ICS Electronics Ltd
product. It is not only an excellent Navtex receiver, but a first class
instrument repeater. It may be the only display you will ever need at
your navigation position. We hope that it gives you many years of
reliable and trustworthy service. Please take the time to read this
manual carefully as it contains some essential information regarding
the operation and maintenance of the product and a useful
background to the Navtex system.
We recommend that you regularly visit the ICS website
www.icselectronics.co.uk for information on updates, the availability
of software enhancements, further options and support. The support
pages contain frequently asked questions about the Nav6 that you
may find useful. There is also a Navtex database providing a list of
operational Navtex stations and their details.
The IMO and various national coastguards also operate informative
websites that you may wish to visit; see
www.icselectronics.co.uk/links.

Nav6 Plus Navtex System User Guide
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QUICK START
QUICK STARTQUICK START
QUICK START
You will find this product extremely easy to operate. Please don't be
intimidated by the comprehensive nature of this manual. In reality,
receiving your first NAVTEX messages just could not be simpler.
•Follow the installation guidelines
•Re-check the cable connections
•Apply power
•If you have not connected a GPS navigation receiver, make sure
that you set the date and time on the screen which will appear at
start up
•Wait for your first NAVTEX message.If you are within range of a
NAVTEX transmitter, you should not need to wait for more than
four hours.
•Refer to “Appendix IV : Nav6 Menu Navigation” for an overview
of the available operating modes & how to switch between them.
•Read the “Basic Operation” section to find out how to use some
of the commonly used features of this product
•If you then want to get the best from the system, read the rest of
the manual!
INTRODUCTION
INTRODUCTIONINTRODUCTION
INTRODUCTION
What Is NAVTEX?
What Is NAVTEX?What Is NAVTEX?
What Is NAVTEX?
NAVTEX is a worldwide system for the broadcast and automatic
reception of maritime safety information (MSI) in English by means
of a narrow-band direct-printing telegraphy. NAVTEX provides
shipping with navigational and meteorological warnings and urgent
information.
NAVTEX is a component of the IMO/IHO worldwide Navigational
Warning Service (WWNWS) as defined by IMO Assembly resolution
A.706(17). It is included within the Global Maritime Distress and
Safety System (GMDSS). Since 1 August 1993, NAVTEX receiving
capability has become mandatory equipment for certain vessels
under the provisions of the International Convention for the Safety of
Life at Sea (SOLAS).
NAVTEX broadcast information is available to all seafarers, free of
charge.

Nav6 Plus Navtex System User Guide
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How Does Navtex Work?
How Does Navtex Work?How Does Navtex Work?
How Does Navtex Work?
NAVTEX transmissions are sent from stations situated worldwide.
The power of each transmission is regulated so as to avoid the
possibility of interference between transmitters. Each station is
allocated a 10-minute time slot every 4 hours so that many stations
can share the same frequency. Stations typically have a
transmission range of 250 – 300 Nm.
NAV6PLUS FEATURES
NAV6PLUS FEATURESNAV6PLUS FEATURES
NAV6PLUS FEATURES
Display Unit
Display UnitDisplay Unit
Display Unit
•The Display Unit uses a high resolution backlit LCD to display
NAVTEX messages in a choice of text sizes.
•The display unit contains a large non-volatile memory to store
NAVTEX messages, NAVTEX station database, all of the user
settings, filter options, LCD contrast and backlight levels. All
messages and settings are retained during power down.
•Several messages can be displayed at once (depending upon
the length of the message) and messages can be scrolled with a
single keypress.
•Messages can be filtered and sorted using a number of user
selectable criteria.
•The Nav6plus can act as an NMEA instrument repeater and is
capable of displaying data in a choice of formats.
•The Nav6plus can be connected to a printer or computer to print
NAVTEX messages and Navigation logs.
•Audible and visible alarms can be set up to indicate reception of
SAR and/or New Messages.
•A sleep mode allows long standby periods with minimum power
consumption, such as when the vessel is left in a marina with
main batteries being trickle charged from the shore.
Sensor Unit
Sensor UnitSensor Unit
Sensor Unit
•The Sensor Unit contains a short whip antenna and dual receiver
that can receive on both 490kHz and 518kHz simultaneously.
•Multiple sensors and displays can be connected together.

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BASIC OPERATION
BASIC OPERATIONBASIC OPERATION
BASIC OPERATION
The Nav6plus is a flexible & powerful tool for receiving, storing &
viewing NAVTEX messages. In order to assist you in getting the best
from your Nav6plus, read this section which contains short cuts to
the most common NAVTEX operations. Read the rest of the manual
for a comprehensive guide to the Nav6plus.
First, find your way around the keypad and the display.
•Centre keys are a ‘navigation pad’ ( UP DOWN LEFT RIGHT ).
•Softkeys are situated on either side of the navigation pad. The
current function of each softkey is shown on the soft-key menu
area at the bottom of the display.
•The mode softkey switches between the three operating ‘modes’
(Navtex, Navigate & Setup).
•The view softkey switches between ‘views’ in each operating
‘mode’. If a ‘view’ has several ‘pages’ associated with it then
these are selected with the page softkey.
•Operate the keys in this order to get to the mode that you want:
MODE →VIEW →PAGE →FUNCTION
Hint : softkeys are context sensitive and cyclical in operation, several
button presses will return you to the start of the cycle.
softkeys
navigation pad
The Keypad
FUNCTION
P
A
GE
V
I
EW
M
O
DE

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The Display
At the bottom of the display is the softkey menu area:
The softkey menu area shows what each softkey does in the current
operating mode.
•The top line of each softkey menu box indicates the option that is
currently selected.
•The bottom line of each softkey menu box indicates the current
function of that softkey.
The example above shows the Nav6plus in Navtex Mode; the right
hand softkey selects the ‘mode’ & the current mode is ‘Navtex’.
At the top of the display is a status bar:
The status information is displayed as a series of icons. The
meaning of the icons is as follows:
Message ID for the message at the top of the display
An alarm is active
NMEA / GPS position data available
490 kHz reception available
518 kHz reception available
Receiving message now
Signal Carrier, but no message
Sensor communication fault
SAR message received
NEW message received
UTC Time
Current softkey function
Current option

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Viewing & Scrolling Through Navtex Messages
To view Navtex messages you must first select the Navtex Mode.
Use the right hand softkey to change modes until ‘Navtex Mode’ is
visible in the right hand softkey menu box. You can now use the UP,
DOWN, LEFT & RIGHT keys to scroll through the displayed
messages. UP & DOWN scroll line by line, whereas LEFT & RIGHT
scroll message by message.
The messages currently displayed are a sub-set of all the messages
stored in memory. Whether you can see a particular message or not
depends upon the current station selection, message filter and age
limit settings (see following sections for details).
Message Storage
All received NAVTEX messages are stored in memory regardless of
whether you have them selected for viewing or not. The Nav6plus
has lots of memory so you will easily have enough storage for all
messages received in any 72 hour period. The messages displayed
are selected from the Nav6plus’ memory by applying the current
message filter preset & age limit settings. This enables you to
change your mind later about your message display options. This
means you will still be able to view messages that were received
previously, but were not selected for display at the time, by changing
the current message filter or age setting.
After using the Nav6plus for a while you may notice that if you
receive a particular message more than once there will only ever be
one copy in view. If a message has been received more than once
the Nav6plus will store only the best version. It even attempts to
repair corrupted messages using comparing copies of the same
message!
Filter Presets
The messages currently available for viewing on screen are selected
from the messages stored in memory by applying ‘filter presets’.
To see the current selected filter presets go to [Navtex Mode⇒
⇒⇒
⇒Filter
View]. You will notice that the left hand softkey is labelled ‘Preset’
and a number from 1 to 5 is visible. This is the currently selected
filter preset number for the this ‘filter page’. Each of the 4 filter pages
(518 Types, 518 Stns, 490 Types & 490 Stns) has its own 5 presets.
In any one of the filter pages press PRESET to change the preset
number. You will notice that the settings on the screen change with

Nav6 Plus Navtex System User Guide
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filter preset number.
Select the preset that you require for the filter page that you are
viewing and then look at the presets for the other filter pages. Note
that the preset that is displayed is the one that is currently applied to
the message display.
Multiple presets can be used for switching quickly between different
sets of messages on the screen. For instance, if you want to show
just ‘navigational warnings from all stations in range’, you can use a
preset to do this.
Although the presets are pre-programmed, you can set them to any
filter setting you require.
Tip : Use preset 1 for normal operation and only use the other
presets if you want to switch between different sets of messages on
the display.
Station Selection
If you leave your Nav6plus receiving for 72 hours you will have
received many messages (subject to your current location) and
unless you filter out those stations that are not required for display,
you will be swamped with data. This can either be done
automatically using a GPS or by using manual filter settings. In either
case go to [Navtex Mode⇒
⇒⇒
⇒Filter View⇒
⇒⇒
⇒490 or 518 Stns Page]. You
will notice that each station can be set to one of three filter settings:
Setting Operation
On Messages from station always in view (see note 1)
Off Messages from station never in view
Auto Messages from station only viewed when nearest or in
range depending upon setting (see note 1)
note 1 : messages are only displayed if they also fall within the
ageing limit, error limit and message category filter settings.
An asterisk to the right of the station name indicates that the station
is selected with the current filter setting.

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Automatic Station Selection Using GPS
Many users will just want to display NAVTEX from the nearest
NAVTEX station to their cruising location. This is most easily
achieved by connecting a GPS and selecting ‘Nearest’ station option
in the set up page.
With a GPS connected and ‘Nearest’ selected you should only see
one (or sometimes two) asterisks. Ensure that the set of stations that
you want to automatically select from are all set to Auto. Stations
that you definitely do not want should be set to Off. You may wish to
set your ‘home’ station to On so that you display messages from it
even if it is currently not the nearest station to your cruising position.
Manual Station Selection
Alternatively, you can manually select a station (or stations) setting
stations to On or Off by using the UP, DOWN, LEFT & RIGHT keys.
If you are using a GPS but still want to select stations manually then
do not leave any stations set to Auto.
Message Filtering
You can further reduce the amount of unwanted messages that are
displayed by applying a filter to the message categories. Go to
[Navtex Mode, Filter View, 490 or 518 Types Page]. Each message
category can be turned On or Off or can be set to New using the UP,
DOWN, LEFT & RIGHT keys.
Reading ‘New’ Messages
Sometimes it is useful to know which messages have been received
since you last looked at the Nav6plus display. You may have noticed
that each message header carries a ‘NEW’ icon and that there is an
additional ‘NEW’ icon in the status bar at the top of the display.
Select [Navtex Mode⇒
⇒⇒
⇒Message View] and you will see that what
was the PAGE softkey is now indicated as NEXT NEW. If the
message at the top of the display has the ‘NEW’ icon showing then
the left hand softkey will now be indicated as MARK READ. Once
you have read the message & want to de-emphasise it then press
MARK READ. The ‘NEW’ icon will disappear from the message
header. Press NEXT NEW to jump to the next new message.
Proceed through all of the messages in this way. Once all of the
messages have been marked as read then the ‘NEW’ icon at the top
of the display will also disappear. When you return to the Nav6plus

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12
later on it is now very easy to tell if there are any new messages to
read (the ‘NEW’ icon in the status bar at the top of the display will be
illuminated).
Note that messages that have been ‘marked as read’ will still be
displayed but with the ‘NEW’ icon removed from the header in each
one. However, it is possible to hide messages once they have been
read. Go to [Navtex Mode⇒
⇒⇒
⇒Filter View⇒
⇒⇒
⇒490 or 518 Types Page]
and set the message categories that you want to hide after they
have been marked as read to ‘New’ instead of ‘On’. You may wish to
leave SAR messages as ‘On’ so that they are not hidden once read.
Displaying The Newest Message
All messages are date and time stamped by the Nav6plus even if
there is no GPS connected and therefore no correct source of time
data.
If there is not a GPS connected then you can manually enter the
time and date or just ignore it. The Nav6plus will still order the
messages in the correct chronological order (remember that the
indicated time of reception will be wrong though).
To display the newest message, go to [Navtex Mode⇒
⇒⇒
⇒Sort
View⇒
⇒⇒
⇒Descending Order⇒
⇒⇒
⇒Date Criteria]. The newest message is
now at the top of the display.
Message Aging
NAVTEX messages become less relevant over time & eventually just
clutter the display. In order to reduce the number of obsolete
NAVTEX messages that are being displayed, the Nav6plus uses the
concept of a message ‘Age Limit’.
It is possible to hide messages that are older than a certain pre-
settable age limit. These messages are still stored in the Nav6plus
memory for a considerable time after they have been removed from
the display and can still be displayed if necessary by increasing the
message age limit setting.
To change the age limit go to [Setup Mode⇒
⇒⇒
⇒Navtex View⇒
⇒⇒
⇒Options
Page] and select the age limit that you require. Use the UP &
DOWN key to select ‘age limit’ and LEFT & RIGHT keys to select a
value. 3 days is a sensible choice as NAVTEX messages have a
nominal life of 72 hours. Set a longer age limit if you wish to display
NAVTEX messages going back over the previous weeks.

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ADVANCED OPERATION
ADVANCED OPERATIONADVANCED OPERATION
ADVANCED OPERATION
This section provides a detailed description of the operation of your
Nav6plus. The three operating modes are described in detail.
Remember to use the right-hand MODE softkey to switch between
the operating modes.
NAVTEX MODE
NAVTEX MODENAVTEX MODE
NAVTEX MODE
Navtex Mode is only available if a
sensor is (or has been) connected
to the display and the Navtex
frequency setting on the Navtex
options page is set to 518 kHz, 490
kHz or Both.
In Navtex Mode, the display
consists of a large area dedicated
to displaying NAVTEX messages,
with a status bar at the top, and
descriptions of the softkey
functions at the bottom.
It is possible to scroll up and down
the messages line by line, using
the UP and DOWN keys.
Additionally, you can step through
the display, message by message
using the LEFT and RIGHT keys.
Four different ‘views’ can be selected by pressing the VIEW softkey:
Message View
Print View (when enabled in setup)
Sort View
Filter View

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Navtex Mode, Message View
Navtex Mode, Message ViewNavtex Mode, Message View
Navtex Mode, Message View
This view can be used for keeping track of new messages as they
are received and displayed. Each new message can be accessed
by a single key press & then marked as read, if required.
The NEXT NEW softkey should be used to move the next new
message to the top of the Navtex display, where it can be marked as
read by pressing MARK READ. Note that the message that will be
‘marked as read’ is indicated in the top left of the status bar. This is
particularly useful when the message’s header has scrolled off the
top of the display area.
Navtex Mode, Print View
Navtex Mode, Print ViewNavtex Mode, Print View
Navtex Mode, Print View
This view allows individual messages to be printed. The ‘Print View’
is only displayed if the manual print setting is enabled on the [Setup
Mode⇒
⇒⇒
⇒Navtex View⇒
⇒⇒
⇒Options Page]. Printing is only possible if an
external printer or PC is installed as part of the system.
The NEXT NEW softkey can be used to move the next new
message to the top of the Navtex display where pressing PRINT will
print it.
Navtex Mode, Sort View
Navtex Mode, Sort ViewNavtex Mode, Sort View
Navtex Mode, Sort View
From within this view different sort criteria can be applied to order
the messages on the display. The Navtex Mode display can be
sorted in one of three ways by pressing the CRITERIA softkey:
Sort by Station
Sort by Type
Sort by Date
The sort can be further organised in ascending or descending order
by pressing the ORDER softkey.
Sort by Station orders the messages by Navtex frequency and the
alphabetical order of their station letters.
Sort by Type orders the messages in the alphabetical order of their
message identifier letter.
Sort by Date orders the messages by the date and time that they
were first received. For sort by date to work properly, the correct time
and date should be set using either time data from the NMEA input
or if this is not available, time should be entered manually at start-up.

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Navtex Mode, Filter View
Navtex Mode, Filter ViewNavtex Mode, Filter View
Navtex Mode, Filter View
This view allows specific stations to be selected for display and the
various message categories to be turned on or off. Use the filter view
to select which message types from which stations you wish to see
displayed on the Navtex display.
(Tip: even if you have de-selected messages from a particular
station and/or message type, the system will still receive and store
those messages. You will be able to view those messages by re-
selecting them in Filter View.).
5 different sets of filter settings can be programmed into the unit.
Using the filter presets allows quick selection of 5 different filter
settings. Once a preset is selected, the filter settings for that preset
may be changed as required. The filter settings for the current
selected preset will be applied when NAVTEX messages are next
viewed. Press the PRESET softkey to select a preset.
(Tip: Set up the 5 filter presets for the stations and message types
that you use most. For example:
Preset 1 - all message types from nearest station;
Preset 2 - meteorological warnings from nearest station,
Preset 3 - navigational warnings from nearest station;
Preset 4 - new messages of all message types from nearest station;
Preset 5 – new messages of all message types from stations in
range)
There is a ‘stations’ and ‘types’ filter page for each selected receive
frequency. Use the PAGE softkey to select one of the four possible
filter pages: 518 Stations, 518 Types, 490 Stations, or 490 Types.

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Message Categories
The picture shows the 518 Types
filter page; the 490 Types filter
page is similar.
Each of the message types can be
selected as either On, Off or New
Use the UP and DOWN keys to
select the message type setting
that you wish to edit. Use the LEFT
and RIGHT keys to change the
setting.
Set each message type filter to one
of the following:
Setting Notes
On Message type always displayed
Off Message type never displayed
New Message type only displayed when new. Messages
marked as read will not appear.
Stations
The picture shows the 518 Stations
filter page; the 490 Stations filter
page is similar. Use the UP and
DOWN keys to select the station
filter setting that you wish to edit.
Use the LEFT and RIGHT keys to
change the setting.
The ‘Auto Station Filter’ setting can
be either Nearest or In Range. This
setting is active only when you
have a GPS receiver connected to
the NMEA input and it applies only
to stations set to Auto. To display
messages from the nearest station
to your current position, set the
auto station filter to Nearest.

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To display messages from all stations in range of your current
position, set the auto station filter to In Range.
For all settings, an asterisk appears next to all stations for which
messages will be displayed.
Set the filter for each station to one of the following:
Setting Notes
On Messages from station always displayed
Off Messages from station never displayed
Auto Messages from station displayed only when nearest or in
range depending upon ‘Auto Station Filter’ setting.
Important: You may wish to leave your Nav6plus running whilst your
GPS or instrument system is disconnected or switched off. If you do
this then please be aware that the Navigate data items derived from
NMEA (including position) will time out after a short while. If you
have also opted to display only the ‘nearest’ NAVTEX station or
stations ‘in range’ then the Nav6plus will no longer have the required
position data. It will revert to displaying all stations that are set to
‘Auto’. As soon as the NMEA data becomes available again only the
‘Nearest’ or ‘In Range’ stations will be displayed dependant upon
your current settings.

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NAVIGATE MODE
NAVIGATE MODENAVIGATE MODE
NAVIGATE MODE
Navigate Mode is only available if there is a GPS or other source of
NMEA 0183 data connected to the Nav6plus NMEA input.
The GPS icon in the status bar at the top of the display will be
illuminated only if there is position data available on the NMEA input.
There are five fixed-format Navigate data display views and four user
configurable views. These can be selected from within the Navigate
Mode using the VIEW softkey. The five fixed views are:
Position View
Combined View
Waypoint View
Conning View
Log View
The user configurable views are User 1 View, User 2 View, User 3
View and User 4 View.
(Tip: Disable views that are not required, in [Setup Mode⇒
⇒⇒
⇒Navigate
⇒
⇒⇒
⇒Options Page and Setup Mode⇒
⇒⇒
⇒Navigate⇒
⇒⇒
⇒User View Page]).
(Tip: Display units can be changed in the Navigate Options page).
Note: Data fields that are not available on the NMEA input are
indicated by a series of dashes (e.g. ---.--).
Important
•The correct magnetic variation must be input at the navigation
instruments (e.g. GPS, electronic compass) for the accurate
display of COG, set, waypoint bearing and heading.
•For the purposes of testing your installation, you may wish to use
your GPS’s simulator mode to generate data for the Nav6plus.
Please check your GPS User Manual to find out whether it
transmits valid NMEA data whilst it is in its simulator mode –
many GPS’s do not set the ‘data valid’ flag in the NMEA
sentences during simulation. As a safety feature, the Nav6plus
will ignore any NMEA sentences where the ‘data valid’ flag is not
set.
•The Nav6plus has a built in NMEA simulator mode – please
ensure that it is switched OFF in normal operation.

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Position View
The Position View shows GPS
information (Position, COG and
SOG), Depth reading and Distance
log using a large font.
The UP, DOWN, LEFT and RIGHT
keys have no function.
Combined View
Combined ViewCombined View
Combined View
The Combined View shows all
NMEA input data on one screen
using a small font.
The UP, DOWN, LEFT and RIGHT
keys have no function.

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Waypoint View
Waypoint ViewWaypoint View
Waypoint View
The Waypoint View shows waypoint
navigation information and a
graphical “rolling road” display of the
boat position and course relative to
the course line. The rolling road
display can be used to steer the boat
along the course line whilst keeping
the cross track error within chosen
limits (the XTE limit may be changed
on the [Setup mode⇒
⇒⇒
⇒Navigate
View⇒
⇒⇒
⇒Options Page] ). The
Waypoint View shows the waypoint
name, waypoint position, time to go
(TTG in hours, minutes and
seconds), range and bearing to
waypoint, closing speed to way
point, cross track error and COG and
SOG.
The UP, DOWN, LEFT and RIGHT keys have no function.
Conning View
Conning ViewConning View
Conning View
The Conning Display is a unique
analogue display which shows
overlapping vectors for Heading
(course through the water), Course
Over the Ground (COG), Set (a
combination of leeway and tide) and
wind. All of these vectors are
displayed relative to the current
heading, which is displayed in digital
form at the top of the screen.
Heading is shown as a single
headed arrow; Course Over the
Ground (COG) is shown as a double
headed arrow, and Set is shown as
a triple headed arrow - in the familiar
manner. The wind vector displays
variable tail patterns according to the
strength of the wind. It follows the
usual meteorological wind symbol rules: 5 kts per half feather, 10 kts