I have________with unknown vessel.
________is the most visible signal of distress from a lifeboat at sea in the daytime.
Stop search and return to________.
What is the position of the vessel________distress?
I'm disable,communicate with me.
________is your freeboard?
There is a________mine in position 50oN,30oW.
Pilot Station,this is Chinese ship Jinsha________Over.
I am ready ________ your message.
MAYDAY is to be used to announce________.
GMDSS题库试题(1)
GMDSS题库试题(2)
GMDSS题库试题(3)
GMDSS题库试题(4)
GMDSS题库试题(5)
GMDSS试题练习(1)
GMDSS试题练习(2)
GMDSS试题练习(3)
GMDSS试题练习(4)
GMDSS试题练习(5)