...Band Direct Printing telex (NBDP), which is the important part of the Global Maritime Distress and Safety System (GMDSS), too. The system uses the single frequency of 518 kHz to broadcast maritime safety messages in the English.
基于1个网页-相关网页
... maritime distress system 海上遇险系统 maritime distress call 海上遇险呼叫 global maritime distress and safety 全球遇险与安全系统 ...
基于1个网页-相关网页
应用推荐