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
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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
A.in sight of one another in fog
B.navigating in or near an area of restricted visibility
C.only if they are showing special purpose lights
D.only if they have operational radar
A.state of wind，sea，and current，and the proximity of navigational hazards
B.maximum attainable speed of your vessel
C.temperature
D.aids to navigation that are available
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.
Which vessel is the stand-on vessel when two vessels crossing in fog are NOT in sight of one another（）.
You are under sail and overtaking a tug and tow.Which action is correct（）.
Which vessel is NOT to be regarded as restricted in her ability to maneuver（）.
Which display indicates a vessel conducting mineclearance operations（）.
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 （）.
When underway in a channel，you should if safe and practicable（）.
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（）.
Which statement correctly applies to a situation where a sailing vessel is overtaking a power-driven vessel（）.
Under what condition are you allowed to depart from the rules of the road（）.