Resolution MSC.148(77)
ADOPTION OF THE REVISED PERFORMANCE STANDARDS FOR NARROW-BAND DIRECT-PRINTING
TELEGRAPH EQUIPMENT FOR THE RECEPTION OF NAVIGATIONAL AND METEOROLOGICAL
WARNINGS AND URGENT INFORMATION TO SHIPS (NAVTEX)
(adopted
on 5 June 2003)
THE
MARITIME SAFETY COMMITTEE,
RECALLING
Article 28(b) of the Convention on the International Maritime Organization
concerning the functions of the Committee,
RECALLING
ALSO resolution A.886(21), by which the Assembly resolved that the functions of
adopting performance standards for radio and navigational equipment, as well as
amendments thereto, should be performed by the Maritime Safety Committee on
behalf of the Organization,
NOTING
the carriage requirement in SOLAS chapter IV 7.1.4 for a receiver capable of
receiving International NAVTEX narrow-band direct-printing (NBDP) broadcasts
for the promulgation of navigational and meteorological warnings to shipping,
NOTING
FURTHER the success of NAVTEX in the promulgation of Maritime Safety
Information (MSI),
NOTING
ALSO with regard to the enhanced storage, processing and display possibilities
offered by recent technical advances,
CONSIDERING
that further growth in information promulgated to ships will be constrained by
the capacity of the International NAVTEX service and the increasing importance
of National NAVTEX services,
HAVING
CONSIDERED the recommendations on the revision of resolution A.525(13) made by
the Sub-Committee on Radiocommunications and Search and Rescue at its seventh
session,
1.
ADOPTS the revised "Recommendation on Performance Standards for
Narrow-Band Direct-Printing Telegraph Equipment for the Reception of
Navigational and Meteorological Warnings and Urgent Information to Ships
(NAVTEX)" set out in the Annex to the present resolution;
2.
RECOMMENDS Governments to ensure that NAVTEX receiver equipment:
a) if installed on or after
1 July 2005, conforms to performance standards not inferior to those specified
in the annex to the present resolution; and
b) if installed before 1
July 2005, conforms to performance standards not inferior to those specified in
the Annex to resolution A.525(13).
ANNEX.
REVISED RECOMMENDATION ON PERFORMANCE STANDARDS FOR NARROW-BAND DIRECT-PRINTING
TELEGRAPH EQUIPMENT FOR THE RECEPTION OF NAVIGATIONAL AND METEOROLOGICAL
WARNINGS AND URGENT INFORMATION TO SHIPS (NAVTEX)
The
equipment, in addition to meeting the requirements of the Radio Regulations,
the provisions of Recommendation ITU-R M.540 applicable to shipborne equipment
and the general requirements set out in resolution A.694(17), should comply
with the following performance standards.
The
equipment should comprise radio receivers, a signal processor and:
either
.1 an integrated printing
device;
or
.2 a dedicated display
device, printer output port and a non-volatile message memory;
or
.3 a connection to an
integrated navigation system.
Details
of the coverage areas and message categories which have been excluded by the
operator from reception and/or display should be readily available.
4.1
The equipment should contain one receiver operating on the frequency prescribed
by the Radio Regulations for the international NAVTEX system. The equipment
should contain a second receiver capable of working at the same time as the
first on at least two other frequencies recognised for the transmission of
NAVTEX information. The first receiver should have priority in the display or
printing of received information. Printing or displaying of messages from one
receiver should not prevent reception by the other receiver.
4.2
The receiver sensitivity should be such that for a source with an e.m.f. of
2 mV in series with a
non-reactive impedance of 50 W, the character error rate is below 4%.
5.1
The display device and/or printer should be able to display a minimum of 32
characters per line.
5.1bis
If a dedicated display device is used, the following requirements should be
met:
.1 an indication of newly
received unsuppressed messages should be immediately displayed until
acknowledged or until 24 hours after receipt; and
.2 newly received
unsuppressed messages should also be displayed.
5.2
The display device should be able to display at least 16 lines of message text.
5.3
The design and size of the display device should be such that displayed
information is easily read under all conditions by observers at normal working
distances and viewing angles.
5.3bis
Where there is no printer, the display device should be located in the position
from which the ship is normally navigated.
5.4
If automatic line feed entails division of a word, this should be indicated in
the displayed/printed text.
5.5
When displaying received messages on a display device, a clear indication of
the end of a message should be given by automatically adding line feeds after
the message or including some other form of delineation. The printer or printer
output should automatically insert line feeds after completing print of the
received message.
5.6
The equipment should display/print an asterisk if the character is received
corrupted.
5.7
Where the printer is not integrated, it should be possible to select the
following data to be output to a printer:
.1 all messages as they are
received;
.2 all messages stored in
the message memory;
.3 all messages received on
specified frequencies, from specified locations or having specified message
designators;
.4 all messages currently
displayed; and
.5 individual messages
selected from those appearing on the display.
6.1 Non-Volatile Message Memory
6.1.1
For each receiver fitted it should be possible to record at least 200 messages
of average length 500 characters (printable and non-printable) in non-volatile
message memory. It should not be possible for the user to erase messages from
memory. When the memory is full, the oldest messages should be overwritten by
new messages.
6.1.2
The user should be able to tag individual messages for permanent retention.
These messages may occupy up to 25 % of the available memory and should not be
overwritten by new messages. When no longer required, the user should be able
to remove the tag on these messages which may then be overwritten in normal
course.
6.2.1
The equipment should be capable of internally storing at least 200 message
identifications for each receiver provided.