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
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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
A.radio communications that are available
B.maximum speed of your vessel
C.temperature
D.current
最新試題
When you doubt the existence of risk of collision,（）.
You see another vessel approaching，and its compass bearing does not significantly change.This would indicate that（）.
Vessel engaged in the launching or recovery of aircraft is called（）．
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 （）.
Underway at night，a vessel displaying the lights shown is（）.
When visibility is restricted（），we can say it is restricted visibility.
You are on a vessel that cannot comply with the spacing requirement for masthead lights.What is required in this situation（）.
Under what condition are you allowed to depart from the rules of the road（）.
Which statement correctly applies to a situation where a sailing vessel is overtaking a power-driven vessel（）.
You are approaching another vessel and will pass starboard to starboard without danger if no course changes are made.You should（）.