Service manual
Commercial
in
confidence
SMARTFIND
NAVTEX
service
manual
Page
4
1.
INTRODUCTION
NAVTEX
is
a
method
of
transmitting
navigational
warnings
and
weather
forecasts
from
designated
coast
radio
stations.
All
English
language
transmissions
are
made
on
518
kHz.
Each
station
is
allocated
several
time
‘slots’
during
the
day,
when
it
is
permitted
to
transmit;
these
are
normally
at
four
hourly
intervals.
The
only
exceptions
to
this
are
gale
warnings
and
search
and
rescue
messages,
which
may
be
transmitted
at
any
time.
Subject
to
IMO
approval,
additional
local
language
transmissions
may
be
made
on
490
kHz
and
on
4209.5
kHz.
Reception
of
NAVTEX
is
normally
limited
to
an
area
of
200
-
300
miles
radius
around
each
transmitting
station,
although
greater
ranges
are
possible
at
night.
The
SMARTFIND
NAVTEX
has
been
designed
to
the
latest
European
and
International
specifications
to
provide
up
to
date
weather
and
marine
safety
information
to
commercial
vessels.
It
meets
IMO
requirements
under
GMDSS:
IMO
MSC.148
(77)
and
IEC
61097-6
(Ed
2.0).
Installation
is
straight
forward.
Connect
the
SMARTFIND
NAVTEX
to
a
12
or
24
volt
DC
supply
and
connect
a
suitable
antenna.
Switch
it
on,
and
it
will
start
displaying
and
storing
NAVTEX
messages
without
further
manual
intervention.
Note
that
if
there
are
only
a
couple
of
NAVTEX
stations
within
range
it
may
be
several
hours
before
the
first
message
is
received.
If
you
are
within
a
sea
area
where
you
are
able
to
receive
messages
from
multiple
NAVTEX
stations
(particularly
at
night),
you
may
be
quickly
overwhelmed
with
information.
It
can
therefore
be
set
up
to
display
only
those
stations
and
message
categories
you
want
to
receive
and
which
are
applicable
to
the
sea
area
in
which
you
are
sailing.
Normally,
routine
messages
are
repeated
at
four
hourly
intervals.
Provided
that
the
SMARTFIND
NAVTEX
is
left
running,
repeated
messages
are
not
displayed
more
than
once.
Each
message
is
retained
for
three
days
(72
hours)
after
its
last
reception
before
being
automatically
deleted,
unless
the
message
has
been
marked
as
locked.
The
SMARTFIND
NAVTEX
can
be
installed
with
either
the
bulkhead-mounting
bracket
or
the
flush
panel
mounting
kit
provided
with
the
product.
The
SMARTFIND
NAVTEX
contains
3
receiver
channels,
tuned
to
490
kHz,
518
kHz
and
4209.5
kHz.
The
SMARTFIND
NAVTEX
will
receive
on
all
3
frequencies
simultaneously
in
those
parts
of
the
world
where
transmissions
are
available.
The
SMARTFIND
NAVTEX
is
capable
of
being
connected
to
an
Integrated
Bridge
System
(IBS),
transferring
NAVTEX
messages
to
other
navigational
aids
if
required.
Note
that
the
IBS
must
be
compliant
with
the
serial
port
requirements
of
IEC61097-6
(Ed
2.0).
The
SMARTFIND
NAVTEX
will
accept
UTC
time
&
date
information
from
the
IBS
port
if
available.
UTC
time
&
date
will
be
used
to
timestamp
received
NAVTEX
messages.
Note:
The
USB
port
on
the
back
of
the
unit
is
not
operational.