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The INMARSAT C Mobile Earth Station incorporating a compact omni-directional antenna is a terminal which allows message communication and data communication by a Store and Forward method. This system is equipped with capability for distress alert dissemination, and EGC (Enhanced Group Calling: International Safety and Commercial Service Messages in Broadcast Mode) functions as radio equipment suitable for the Global Maritime Distress and Safety System (GMDSS) approved by the International Marine Organization (IMO), and it has been mounted in many vessels. JRC has developed a new Mobile Earth Station JUE-87 suitable for this system, and has confirmed a good performance on a field test.

Koji Yamada
Yoshinori Nishimura
Yoichi Nakamura
Takashi Kawabata
Hiroaki Ohtake