A.can be observed visually
B.can be observed by radar
C.can be located on the radar
D.can be heard
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A.on the way
B.at anchor
C.made fast to a terminal
D.moving against water
A.a non-power driven vessel
B.a sailing vessel
C.a power driven vessel
D.a power driven vessel or a non-power driven vessel
A.by sight and hearing only
B.by all available means besides sight and hearing
C.by all available means except sight and hearing
D.by none of above means
A.all vessels must carry an after range light
B.vessels less than 50 meters in length need not carry an after range light
C.vessels stopped dead in the water should turn off their range lights
D.vessels over 20 meters in length must carry both range lights from sunset to sunrise
A.One blast at one-minute intervals
B.One blast at two-minute intervals
C.Two blasts at one-minute intervals
D.One prolonged and two short blasts at two-minute intervals
最新試題
When visibility is restricted（），we can say it is restricted visibility.
You are Master of a towing vessel engaged in towing three barges astern.The middle barge of the tow would be required to sound which of the following during restricted visibility （）.
You are underway and approaching a bend in the channel where vessels approaching from the opposite direction cannot be seen．You should sound（）.
Your vessel is not underway when（）.
Which one of two crossing power-driven vessels has the right of way in a fog（）.
You are under sail and overtaking a tug and tow.Which action is correct（）.
You hear the fog signal of another vessel forward of your beam.Risk of collision may exist.You MUST（）.
You are underway in reduced visibility.You hear the fog signal of another vessel about 20° on your starboard bow.Risk of collision may exist.You should（）.
When shall the stand-on vessel in a crossing situation take action to avoid the other vessel（）.
You see a vessel displaying three lights in a vertical line.The highest and lowest lights are red and the middle light is white.She is also showing a white light at the stern，which is lower than the forward light.It could be a（）.