单项选择题
The Network Coordination Station for the INMARSAT-A coast stations in the Pacific ocean region is in（）.
A.Yamaguchi, Japan B.Beijing, China C.Nakhodka, Russia D.Perth, Australia
单项选择题 The NCC is located in the（）.
单项选择题 The GMDSS defines four sea area based on the（）.
单项选择题 The position if the AOR-w satellite in the INMARSAT system is（）above the equator.
