A.Three
B.Two
C.One
D.None
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A.the lines of force cross the equator on a 0°-180°alignment
B.the quadrantal error is 0°
C.there is no vertical component of the Earth's magnetic field
D.the intercardinal headings have less than 1°
A.buoys close at hand
B.fixed known objects on shore
C.buoys at a distance
D.All of the above
A.running fix
B.fix
C.estimated position
D.assumed position
A.true north
B.magnetic north
C.the vessel's beam
D.the vessel's head
A.estimated position
B.fix
C.running fix
D.dead-reckoning position
最新試題
You have been informed that dredging operations may be underway in your vicinity.Which buoy indicates the dredging area（）.
Which position includes the effects of wind and current（）.
（） is not likely to be a methods of Traffic Separation.
Restricted areas at locks and dams are indicated by（）.
What area of the earth cannot be shown on a standard Mercator chart（）.
The four standard light colors used for lighted aids to navigation are red，green，white，and （）.
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 points on the earth’s surface where the magnetic dip is 90° are（）.
Which statement concerning current is TRUE（）.
Depiction of TSS's on charts uses（）as the primary color.