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
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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
A.MAYDAY
B.PAN-PAN
C.SECURITE
D.SOS
A.TTT
B.The spoken word PAN
C.The spoken word SECURITE
D.XXX
最新試題
The best method to stop a vessel from dragging anchor in a sand bottom is to（）.
What does the term TO NAVIGATE WITH CAUTION mean?（）.
To develop maximum anchor holding power，the optimum angle between the anchor’s shank and the mooring lines is（）.
The towing light is a(n)（）.
What is the normal length of anchor cable used to anchor a vessel?（）
To predict the actual depth of water using the Tide Tables，the number obtained from the Tide Tables is（）.
What is normally used to pass a mooring line to a dock?（）
Which is NOT a distress signal?（）
Tripping defects in anchors frequently occur in（）.
What is the（）of the turning circle in mavoeuvring?