A.a ship is threatened by grave and imminent danger and requests immediate assistance
B.a calling station has an urgent message about the safety of a person
C.the message following the prefix will be about the safety of navigation
D.the message following is a meteorological warning
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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
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
最新試題
The radiotelephone safety message urgently concerned with safety of a person would be prefixed by the word（）.
Which is NOT a distress signal?（）
The best method to stop a vessel from dragging anchor in a sand bottom is to（）.
PAN-PAN repeated three times over the radiotelephone indicates which type of message will follow?（）
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（）.
Fog forms when the air（）.
To develop maximum anchor holding power，the optimum angle between the anchor’s shank and the mooring lines is（）.
The term OIL as used in the Oil Pollution Regulations means（）.
To prevent a wooden hull from leaking you caulk it（）.
What is the normal length of anchor cable used to anchor a vessel?（）