TIÊU CHUẨN VỚI NAVTEX
PERFORMANCE STANDARDS FOR THE RECEPTION OF MARITIME SAFETY INFORMATION AND SEARCH AND RESCUE RELATED INFORMATION BY MF (NAVTEX) AND HF
MSC.516(105)
1 INTRODUCTION
1.1 The equipment receives maritime safety information (MSI) and search and rescue (SAR) related information transmitted by NAVTEX services and HF, and may be used to meet the requirements of SOLAS regulation IV/7.1.4.
1.2 In addition to meeting the requirements of the Radio Regulations, the NAVTEX receiver should comply with Recommendation ITU-R M.540 and the receiver for HF-MSI should comply with Recommendation ITU-R M.688.
1.3 The equipment should comply also with the requirements set out in resolutions A.694(17) and MSC.191(79), as amended, and with the following performance standards.
2 GENERAL
The equipment should comprise radio receivers of at least one frequency band, a signal processor and either: .1 an integrated printing device; or .2 a dedicated display device,1 printer output port and a non-volatile message memory; or .3 a connection to an integrated navigation system and a non-volatile message memory.
3 CONTROLS AND INDICATORS
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 RECEIVERS
4.1 Receiver for NAVTEX 4.1.1 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 one on at least two other frequencies recognized 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. 4.1.2 The receiver sensitivity should be such that for a source with an e.m.f. of 2mV in series with a non-reactive impedance of 50 W, the character error rate is below 4%
4.2 Receiver for HF-MSI 4.2.1 The receiver sensitivity should be equal to or better than e.m.f of 6 μV at the receiver input to produce an NBDP output character error rate of not greater than 10-2 . 4.2.2 A UTC clock, accurate to at least one second, and associated with a reprogrammable memory which contains the frequency sequence and UTC broadcast schedules of all stations, should control the HF receiver to provide automatic MSI reception. 4.2.3 The receiver should be capable of being alerted by digital selective calling and tuned in to the HF-MSI frequency to receive unscheduled broadcasts automatically.
5 DISPLAY DEVICE AND PRINTER
5.1 The display device and/or printer should be able to display a minimum of 32 characters per line.
5.2 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.
5.3 The display device should be able to display at least 16 lines of message text.
5.4 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.
5.5 If automatic line feed entails division of a word, this should be indicated in the displayed/printed text.
5.6 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.
5.7 The equipment should display/print an asterisk if the character is received corrupted.
5.8 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.
Tiêu chuẩn này bắt đầu có HIỆU LỰC từ : 01/01/2024
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