A.deviation
B.annual rate of variation change
C.precession
D.compass error
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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
A.magnetic equator
B.magnetic longitude reference line
C.points where there is no variation
D.points where there is no annual change in variation
最新試題
The broken magenta lines（long and short dashes）in and around Mobjack Bay indicate（）.
（）is not a position-fixing system.
On chart，bearings to near objects should be used in preference to objects farther off，because（）.
The revision date of a chart is printed on which area of the chart? （）
The short-long dashed，magenta lines parallel to York River Entrance Channel mark（）．
When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to （）.
The maximum difference between mean time and apparent time is （）.
The description Racon beside an illustration on a chart would mean a （）.
When a buoy is in position only during a certain period of the year，where may the dates when the buoy is in position be found?（）
The soundings on the chart are based on the depth of water available at （）.