GMDSS普通操作员 第05讲：Passage 38 第05讲：Passage 38.ppt

航运系航海教研室 航运系航海教研室 航运系航海教研室 航运系航海教研室 航运系航海教研室 航运系航海教研室 航运系航海教研室 航运系航海教研室 航运系航海教研室 航运系航海教研室 Passage 38 It is obviously important to broadcast Maritime Safety Information (MSI) to the ships at sea. MSI is defined in general terms as “navigational and meteorological forecasts, and other urgent safety-related messages”. The categories of MSI under the GMDSS have expanded considerably, in keeping with the requirements of world shipping and the capabilities of new technology. The new developments have offered the greatest potential benefit and improvement in safety services for all vessels. There are seven basic categories of MSI within the GMDSS. Passage 38 Prior to the GMDSS, in order to receive all necessary messages in the above categories, operators would require the broadcast times and frequencies of the numerous radio stations and take time to copy each relevant broadcast. Under the GMDSS, a vessel anywhere in the world should be able to receive all types of information by just flipping the switch of two smart receivers. The MSI service is an internationally coordinated network of broadcasts of Maritime Safety Information from different Information Providers, such as: Passage 38 ① National Hydrographic Offices, for navigational warnings and electronic chart corrections ; ② National Meteorological Offices, for weather warnings and forecasts; ③ Rescue Coordination Centers, for shore-to-ship distress alerts, and other urgent information ; ④ International Ice Patrol, for North Atlantic Ice hazards. Only Information Providers approved by the IMO, the IHO or the WMO are given the authorization to make SafetyNET broadcasts. Passage 38 1. Since the accomplishment of GMDSS, what has happened to MSI? A. The conceptional framework has been enlarged. B. The conceptional framework has been narrowed. C. It has nothing to do with concept of MSI. D. All of the above. 正确答案：A Passage 38 2. According to the passage, how many basic categorie