unwatched
surrounded by riprap
a minor light
constructed on an artificial island
第1题:
The irregular black line around a charted light such as Race Rock Light indicates that it is ______.
A.unwatched
B.surrounded by riprap
C.a minor light
D.constructed on an artificial island
第2题:
A buoy marking a wreck will show a(an) ______.
A.white light FL (2) and a topmark of 2 black spheres
B.occulting green light and may be lettered
C.yellow light and will be numbered
D.continuous quick white light and may be numbered
第3题:
A radar range to a small,charted object such as a light will provide a line of position in which form?
A.Straight line
B.Arc
C.Parabola
D.Hyperbola
第4题:
第5题:
第6题:
A vessel servicing a pipeline during the day shall display ______.
A.three black shapes in a vertical line; the highest and lowest are balls,and the middle one is a diamond
B.three shapes in a vertical line; the highest and lowest are red balls,and the middle one is a white diamond
C.three black balls in a vertical line
D.two black balls in a vertical line
第7题:
第8题:
A true bearing of a charted object,when plotted on a chart,will establish a ______.
A.fix
B.line of position
C.relative bearing
D.range
第9题:
第10题: