A. the angle between the horizontal and the line of sight to the visible horizon
B. index error
C. parallax
D. terrestrial refraction
您可能感興趣的試卷
你可能感興趣的試題
A.Mean low water
B.Mean high water
C.Average water level
D.Geographical sea level
A.the time of day
B.the seasons
C.geography
D.All of the above
A.sphere
B.oblate spheroid
C.spheroid of revolution
D.oblate eggoid
A.air gap
B.freeboard
C.penetration
D.water depth
A.range of tide
B.height of tide
C.charted depth
D.actual water depth
最新試題
Above-normal tides near the center of a hurricane maybe caused by the （）.
The height of eye correction is smaller than geometrical dip because of （）.
The meaning of ebb tide is that （）.
Areas enclosed by a long and short dashed magenta line indicate （）.
Attention is called to the fact that in many cases charted depths may be decreased by up to （）.
Clearance gauges at bridges indicate （）.
A pilot vessel on pilotage duty at night will show sidelights and a sternlight （）.
The period at high or low tide during which there is no change in the height of the water is called the （）.
During daylight savings time the meridian used for determining the time is located farther （）.
A pilot vessel on pilotage duty shall show identity lights （）.