A.is 50% water saturated
B.is 90% water saturated
C.temperature is greater than the dew point temperature
D.temperature is equal to，or below the dew point temperature
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A.in doubt that another vessel is taking sufficient action to avoid a collision
B.altering course to starboard
C.altering course to port
D.the stand-on vessel and will maintain course and speed
A.SOS three times
B.Additional transmissions to aid direction finding
C.E for one minute，followed by T for one minute
D.Two tones，10-15 seconds each
A.Pan-Pan (3 times)
B.Securite Securite Securite
C.TTT TTT TTT
D.No special prefix
A.PAN-PAN
B.MAYDAY
C.SOS
D.SECURITY
A.TTT
B.SOS
C.The spoken word URGENCY
D.The spoken word PAN
最新試題
PAN-PAN repeated three times over the radiotelephone indicates which type of message will follow?（）
There is something wrong with our radar．All kinds of objects can’t be clearly（）within the definite range.
We have no steel wire．You had better（）us one.
When testing a Class A EPIRB you will know the EPIRB is working properly if you hear on 99.5 Mhz FM or any vacant frequency on a nearby AM radio（）.
To develop maximum anchor holding power，the optimum angle between the anchor’s shank and the mooring lines is（）.
What form of ice is of land origin?（）
Which is NOT a distress signal?（）
To reduce mild fever the MOST useful drug is（）.
The use of the danger signal（）.
What is the MOST irritating to the skin?（）