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
Fog forms when the air（）.
The towing light is a(n)（）.
What does the term TO NAVIGATE WITH CAUTION mean?（）.
To predict the actual depth of water using the Tide Tables，the number obtained from the Tide Tables is（）.
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（）.
The best method to stop a vessel from dragging anchor in a sand bottom is to（）.
There is plenty of（）at this area.
PAN-PAN repeated three times over the radiotelephone indicates which type of message will follow?（）
The transmission of messages respecting the dangers specified is free（）cost to the ships concerned.
Tripping defects in anchors frequently occur in（）.