单项选择题
A.Vessel's type B.Vessel's course C.Navigational status D.All of the above
When should the emergency position-indicating radiobeac...
单项选择题When should the emergency position-indicating radiobeacon be activated after abandoning a ship?（）
A.Immediately B.After one hour C.Only when another vessel is in sight D.Only after sunset
When may the automatic identification system (AIS) be s...
单项选择题When may the automatic identification system (AIS) be switched off? （）
A.At anytime as long as it is properly logged B.At the Master's professional judgment C.Only when the vessel is at anchor or in port D.Under no circumstance
When communicating on the radiotelephone using plain En...
单项选择题When communicating on the radiotelephone using plain English，what procedure word indicates the end of my transmission and that a response is necessary? （）
A.Out B.Over C.Roger D.Wilco
