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
Which buoy will NOT display white retro reflective material（）.
Which of the following are data layer categories to be displayed on ECDIS（）．
You have been informed that dredging operations may be underway in your vicinity.Which buoy indicates the dredging area（）.
When entering a channel from seaward，the numbers on buoys（）.
You should plot your dead reckoning position（）.
The equator is（）.
What is an ebb current（）.
You determine your vessel’s position by taking a range and bearing to a buoy.Your position will be plotted as a（n）（）.
（） is a defined area within which ships must use particular caution and should follow the recommended direction of traffic flow.
The recording fathometer produces a graphic record of the（）.