A.NM
B.Ship's Routing
C.Colreg
D.Solas
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A.Set
B.Frequency
C.Period
D.Function
A.bottom contour only up to depths of 100 fathoms
B.depth underneath the keel against a time base
C.contour of the bottom against a distance base
D.depth of water against a distance base
A.Along the magnetic equator
B.Connected by the isoclinal line
C.The isopors
D.The magnetic poles
A.purple
B.orange
C.blue
D.yellow
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
最新試題
When a buoy marks a channel bifurcation，the preferred channel is NOT indicated by（）.
Which of the following are data layer categories to be displayed on ECDIS（）．
The points on the earth’s surface where the magnetic dip is 90° are（）.
The equator is（）.
You should plot your dead reckoning position（）.
A celestial body will cross the prime vertical circle when the latitude is numerically （）.
You determine your vessel’s position by taking a range and bearing to a buoy.Your position will be plotted as a（n）（）.
Traffic separation schemes adopted by the IMO are listed in（）.
Restricted areas at locks and dams are indicated by（）.
What area of the earth cannot be shown on a standard Mercator chart（）.