单项选择题
A.In the Captain's office
B.In the sea cabin
C.At the GMDSS operating position
D.Anywhere on board the vessel
单项选择题 When the GMDSS Radio Operator on watch hears“SECURITE”spoken three times he can expect to receive a message concerning（）.
单项选择题 What publications should a GMDSS Operator consult regarding the proper set-up and operation of vessel equipment（）.
单项选择题 The data travels from the（）to the INMARSAT Network Coordination Station（NCS）and then down to the SES’s on ships at sea.