standard byInternational Electrotechnical Commission , 06/01/2025
This part of IEC 61097 specifies the minimum operational and performance requirements and test methods with required test results for transmitters and receivers capable of voice communication and digital selective calling for the GMDSS operating in either the medium frequency band only or in medium and high frequency bands allocated in the ITU Radio Regulations to the Maritime Mobile Service, as required by Chapter IV of SOLAS 1974 as amended. It is based on IMO resolution MSC.512(105) and takes account of Recommendation ITU-R M.493 for digital selective calling including the automatic connection system.
This document also takes account of the general requirements given in IMO resolution A.694(17) and is associated with IEC 60945. When a requirement in this document is different from that in IEC 60945, the requirement of this document shall take precedence. It further takes account, as appropriate, of requirements for the presentation of navigation-related information on shipborne navigational displays given in IMO resolution MSC.191(79) as amended and is associated with IEC 62288, and the requirements of IMO resolution MSC.302(87) for Bridge Alert Management and is also associated with IEC 62923-1 and IEC 62923-2.
This document also specifies the reception of maritime safety information and search and rescue related information by HF based on IMO resolution MSC.508(105).
NOTE 1 The necessity of HF NBDP (HF-MSI) as part of MF/HF radio facility is determined by the national administration by which the MF/HF radio facility is certified in accordance with this document.
NOTE 2 All text of this document the wording of which is identical to that in IMO Resolutions and to that in the relevant ITU-R Recommendations is printed in italics and is prefixed by references in brackets.
NOTE 3 This document introduces requirements, tests and their required results in the context of digital selective calling (DSC) as defined by ITU-R recommendations such as ITU-R M.493, and in the context of bridge alert management (BAM) as defined by IMO MSC.302(87) and IEC 62923-1. Certain terms, such as "alert", "warning" and "priority" can have different meanings depending on the context in which the term is used. The meaning of specific terms used in this document is as defined in the context of DSC unless specifically expressed otherwise. For example: the expression "BAM alert" is used to indicate that the term "alert" is used in the context of BAM in that instance. Annex D provides further specifications on mapping of signals between the context of DSC and the context of BAM.
