单项选择题
What does EPIRB stand for? （）
A.Emergency Position Indicating Radar Buoy B.Electronic Pulse Indicating Radiobeacon C.Emergency Position Indicating Radiobeacon D.None of the above
单项选择题 What are the vessel equipment and personnel requirements for GMDSS? （）
单项选择题 What are the conditions，under GMDSS，whereby a ship is NOT allowed to depart from any port? （）
单项选择题 VHF Radio is one of the very important navigational instruments on board，（）messages can be sent.
