IEC 61097-6-2005 pdf – Global maritime distress and safety system (GMDSS) – Part 6: Narrowband direct-printing telegraph equipment for the reception of navigational and meteorological warnings and urgent information to ships (NAVTEX).
2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60945, Marine navigation and radio communication equipment – General requirements – Methods of testing and required test results IEC 61 1 62-1 , Maritime navigation and radiocommunication equipment and systems – Digital interfaces – Part 1: Single talker and multiple listeners IEC 61 1 62-2; Maritime navigation and radiocommunication equipment and systems – Digital interfaces – Part 2: Single talker and multiple listeners, high-speed transmission IMO Safety of Life at Sea (SOLAS) Convention (1 974), as amended (GMDSS) IMO Resolution A.694(1 7) (1 991 ) General requirements for shipborne radio equipment forming part of the global maritime distress and safety system (GMDSS) and for electronic navigational aids IMO Resolution MSC.1 48(77) (2003) Revised performance standards for narrow-band direct-printing telegraph equipment for the reception of navigational and meteorological warnings and urgent information to ships (NAVTEX) IMO Publication – NAVTEX Manual IMO Resolution MSC/Circ.1 1 22 Adoption of the revised NAVTEX manual
4 Performance requirements 4.1 General (1 48/A.1 .1 ) 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), and specified in IEC 60945 shall comply with the revised IMO performance standards for NAVTEX equipment Resolution MSC 1 48(77). (1 48/A.2.1 ) The equipment shall comprise radio receivers, a signal processor and: either a) an integrated printing device; or b) a dedicated display device, printer output port and a non-volatile message memory; or NOTE Where there is no printer, the dedicated display device shall be able to be located in the position from which the ship is normally navigated. c) a connection to an integrated navigation system (INS) and a non-volatile message memory. Examples of NAVTEX systems are given in Annex A. 4.2 General characteristics (540/AII.2) The equipment shall be capable of receiving messages in the collective B-mode of the direct printing system specified in ITU-R Recommendation M.625, Annex I,4.
5 Test conditions 5.1 General The EUT shall, unless otherwise agreed, be set up by the test laboratory following instructions contained in the user/installation manual. The test laboratory shall ensure that the EUT is operating normally before testing commences. The tests to this standard may be performed on one or more units of the EUT as agreed between manufacturer and test laboratory. At least one EUT shall in addition to its normal operation be provided with a) a test point at the processor output to the printing device (EUTs with an INS or printer interface shall utilize them for the tests); the level and format of the signal shall be stated by the manufacturer; b) suitable means to either output to the printing device or give access to examine with an external device the contents of the message storage and/or message identifier storage; the means shall be stated by the manufacturer; c) a method of clearing all stored messages and/or message identifiers from non-volatile memory; and d) a method of pre-loading a message and/or message identifier file into non-volatile memory by an external device so that the non-volatile memory may be filled or nearly filled with messages. This file shall be provided by the manufacturer and shall be referred to as the ‘standard test file (STF)’ in this document. The test laboratory shall be capable of a) generating NAVTEX transmissions, on each specified receive frequency, with all possible variations of B 1 B 2 B 3 B 4 characters in accordance with the technical format specified in ITU-R Recommendation M.540. The calibrated apparatus shall also be capable of generating incorrect signals, and b) generating the standard test signals contained in 5.5 for transmission to the EUT.