A.Dead-reckoning position
B.Estimated position
C.Fix
D.Running fix
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A.encountered
B.met
C.contacted
D.seen
A.the differing light colors
B.one system having odd numbers while the other system has even numbers
C.one system using horizontal bands while the other system uses vertical stripes
D.the difference in the periods of the light
A.the light-house
B.the anchorage
C.the pilot station
D.the light-buoy
A.deep laded vessels
B.deeply load vessels
C.deep loading vessels
D.deeply loaded vessels
A.small circle
B.great circle
C.rhumb line
D.hyperbola
最新試題
When using horizontal sextant angles of three objects to fix your position，an indeterminate position will result in which situation（）.
In very high latitudes，the most practical chart projection is the（）.
Which buoy will NOT display white retro reflective material（）.
The points on the earth’s surface where the magnetic dip is 90° are（）.
What area of the earth cannot be shown on a standard Mercator chart（）.
When approaching a preferred-channel buoy，the best channel is NOT indicated by the（）.
When latitude and longitude are used，these shall be expressed in（）（and decimals of a minute if necessary），north or south of the Equator and east or west of Greenwich.
The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the（）.
When using a buoy as an aid to navigation which of the following should be considered?（）
What describes a flood current（）.