全球海上遇险和安全系统 (GMDSS) 第4部分：Inmarsat-C 船舶地球站和 Inmarsat 增强群呼 (EGC) 设备 操作和性能要求、测试方法和所需测试结果

[中文适用范围]： 本部分 IEC 61097 规定了用于全球海上遇险与安全系统(GMDSS)和远程识别与跟踪(LRIT)的能够发送和接收直接打印通信的Inmarsat-C船载地球站(SES)和增强群呼(EGC)接收机的性能要求和测试方法。可用变体包括： Class 0: 独立或作为GMDSS安装组成部分的EGC接收机； Class 1: 仅提供岸到船和船到岸消息传输的基本SES； Class 2: 在Class 1基础上增加使用共享接收机的EGC功能； Class 3: 在Class 1基础上增加使用独立接收机的EGC功能。 本文件符合IMO性能要求、Inmarsat技术特性与测试程序以及IEC 60945通用要求。涵盖设备构造和测试事项，安装相关要求见Inmarsat海事设计与安装指南。 [外文原描述]： IEC 61097-4:2024 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 61097-4:2024 edition 4.0 and the previous IEC 61097-4:2012+AMD1:2016+AMD2:2019 CSV edition 3.2. Furthermore, comments from IEC TC 80 experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the content. IEC 61097-4:2024 specifies the performance requirements and methods of testing for Inmarsat-C ship earth stations (SES) capable of transmitting and receiving direct-printing communications, and for enhanced group call (EGC) receivers, for use in the GMDSS and for use for long-range identification and tracking (LRIT). The available variants are: Class 0: An EGC receiver, either stand-alone or an element of a GMDSS installation in accordance with the Inmarsat design and installation guidelines (DIGs) for GMDSS installations. Class 1: A basic SES providing shore-to-ship and ship-to-shore message transfer only. Class 2: As class 1 but with EGC as an alternative to shore-to-ship transfer using a shared receiver. Class 3: As class 1 but with EGC using an independent receiver. NOTE 1 The 34th session of the IMO Sub-Committee on Radiocommunications decided that class 2 equipment would be adequate to provide sufficient availability for the reception of maritime safety information for the GMDSS. This document complies with IMO performance requirements stated in the normative references, Inmarsat technical characteristics and test procedures, and IEC 60945 general requirements except where modifications are explicitly stated in this document. Technical characteristics essential to GMDSS and LRIT operation as defined by the IMO are identified. All text of this document, whose wording is identical to that in IMO SOLAS Convention 1974 as amended in 1988 and Resolutions MSC.513(105), MSC.263(84) and MSC.306(87) is printed in italics and reference made to the Resolution/Recommendation and subclause number. This document covers equipment construction and testing. Matters relating to installation can be found in the Inmarsat Maritime design and installation guidelines (see Bibliography). Those to be found in IMO Resolutions MSC.513(105), MSC.263(84) and MSC.306(87) are reproduced in Annex A. Responsibility for type approval of Inmarsat-C and Inmarsat-EGC is vested in Inmarsat by IMO Resolutions MSC.513(105) and MSC.306(87) (see 4.2.1). Therefore, this document does not reproduce Inmarsat test procedures in full but refers to where they are given in Inmarsat documentation cited in the normative references to this document (Annex C). NOTE 2 For the purposes of this document the terms Inmarsat C, Inmarsat-C, Inmarsat Standard-C, Standard-C refer to the same equipment.