A.in fog
B.at night
C.in narrow fairway
D.at all times
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A.Three shapes,the highest and lowest shall be red balls,and the middle shall be a white diamond
B.Two black balls
C.Three shapes;the highest and lowest shall be black balls,and the middle shall be a red diamond
D.Three shapes;the highest and lowest shall be black balls and the middle shall be a black diamond
A.Snowfall or blowing snow
B.Lack of ability to estimate distance
C.Harsh contrast between sun-illuminated snow cover and the background
D.Hazy horizons with extensive mirage effects
A.Between sunset and sunrise
B.Only between 8 AM and 4 PM
C.During daylight hours in any visibility
D.During daylight hours in unrestricted visibility only
A.red lights
B.red lights and two white lights
C.red lights with a white light in between
D.white lights with a red light in between
A.will be coming to periscope depth
B.will be coming to the surface
C.is on the bottom in distress
D.is in distress and will try to surface
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When ship at anchor she shall be deemed to be().
When underway in a channel,you should if safe and practicable().
Underway at night,a vessel displaying the lights shown is().
You are aboard the give-way vessel in a crossing situation.What should you NOT do in obeying the Rules().
Which statement is TRUE,according to the Rules().
Which display indicates a vessel conducting mineclearance operations().
You are under sail and overtaking a tug and tow.Which action is correct().
Which vessel is NOT classified as “restricted in her ability to maneuver” ().
You see a vessel carrying a black diamond which indicates a().
You are on a vessel that cannot comply with the spacing requirement for masthead lights.What is required in this situation().