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
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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
A.situations when you can see vessels on radar that you cannot see visually
B.visibility of less than half a mile
C.any condition where visibility is restricted
D.visibility where you cannot see shore
A.any sailing vessel with propelling machinery
B.any vessel propelled by machinery
C.any sailing vessel with or without machinery for propelling
D.any sailing vessel with propelling machinery not in use
最新試題
When a vessel is in any doubt as to whether such a situation exists she shall（）that it does exist and act accordingly.
Vessel engaged in the launching or recovery of aircraft is called（）．
Which one of the following rules is not regarding two power-driven vessels meeting end or nearly end on so as to involve risk of collision（）.
You are on a vessel that cannot comply with the spacing requirement for masthead lights.What is required in this situation（）.
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（）.
You are approaching another vessel and will pass starboard to starboard without danger if no course changes are made.You should（）.
Vessels should maintain a sharp lookout，especially during December through March，when navigating the right whale’s only known calving grounds which lie off the coasts of（）.
You see another vessel approaching，and its compass bearing does not significantly change.This would indicate that（）.
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（）.
You are under sail and overtaking a tug and tow.Which action is correct（）.