航海英語地文航海單項(xiàng)選擇題每日一練(2019.01.13)

A.odd or even numbers
B.the color of their top band
C.the location of the buoy in the channel junction
D.the buoy's light rhythms

A.anchorage area
B.fish net area
C.bifurcation
D.dredging area

A.Horizontal movement of the water toward the land after high tide
B.Horizontal movement of the water toward the land after low tide
C.Horizontal movement of the water away from the land following high tide
D.Horizontal movement of the water away from the land following low tide

A.the primary great circle of the Earth perpendicular to the axis
B.the line to which all celestial observations are reduced
C.the line from which a celestial body's altitude is measured
D.All of the above

A.Dead-reckoning position
B.Estimated position
C.Fix
D.Running fix