EGC system is an element of INMARSAT-C system and it includes safety net service and fleet net service.

增强性群呼是INMARSAT-C系统的组成部分之一，它包括安全网和船队网。

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EGC system is an element of INMARSAT-C system and it includes safety net service and fleet net service.

增强性群呼是INMARSAT-C系统的组成部分之一，它包括安全网和船队网。

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