单项选择题
The position of the INMARSAT satellite over the Atlantic Ocean Region-W is（）.
A.180E above the equator B.64.5 E over the IOR C.15.5W along the straight line D.55.5W above the equator
单项选择题 Mariners should pay much attention in the overlapped area owing to（）.
单项选择题 The satellites over the major ocean regions cover the globe（）.
单项选择题 The Inmarsat system has five major components, they are:（）.
