A.radar conspicuous beacon
B.circular radiobeacon
C.radar transponder beacon
D.radar calibration beacon
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A.deviation
B.annual rate of variation change
C.precession
D.compass error
A.newly edition with up to date correction and in reasonable prices
B.the current edition and incorporate the last Notices to Mariners correction
C.the current edition and incorporate the latest Notices to Mariners correction at the time of sale
D.brand-new one with up to date correction and clean writing
A.C
B.Cl
C.Co
D.c
A.Surging
B.Spilling
C.Plunging
D.Converging
A.you should stay to the north or east of the buoy
B.you should stay to the west or south of the buoy
C.the buoy is a major lighted buoy
D.nothing special for navigational purposes
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The soundings on the chart are based on the depth of water available at （）.
A chart position enclosed by a square is a（n）（）.
The shoreline on charts generally represents the mean（）.
The arrangement of charts in the catalogue is（）.
A chart projection depicting the poles and a small area on either side of a connecting meridian，that is sometimes used for star charts，is the（）.
The short-long dashed，magenta lines parallel to York River Entrance Channel mark（）．
The soundings on the imperial chart are measured in（）.
The only cylindrical chart projection widely used for navigation is the （）.
The maximum difference between mean time and apparent time is （）.
The description Racon beside an illustration on a chart would mean a （）.