A.Safety message
B.Urgency message
C.Distress message
D.Routine message
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A.at
B.on
C.in
D.above
最新試題
The radiotelegraphy safety messages for condition indicating distress，urgency and safety，respectively，are（）.
In order to prevent galvanic corrosion，an aluminum boat must be insulated from the davits and gripes. Which of the following is acceptable as an insulator?（）
I hope you don’t mind（）the radar for us in a short time.
To safely anchor a vessel there must be sufficient scope in the anchor cable. Scope is the ratio of（）.
Which may ignite fuel vapors?（）
Should the vessel have no deratisation certificate at the time of her delivery，she（）be held to be unseaworthy.
The ship is now down（）head.
Three SHORT BLASTS mean（）.
Where would you find the call sign or call letters of the radio station on your ship?（）
Which method of adjusting mooring lines is MOST useful for leaving a boat free to rise and fall with the tide?（）