A.variation
B.true directions
C.magnetic directions
D.annual rate of variation change
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A.Cly
B.Cla
C.Cl
D.C
A.In the Coast Pilot
B.In the Nautical Almanac
C.In the List of Lights
D.In the Sailing Directions
A.Feet
B.Yards
C.Fathoms
D.Meters
A.fish trap areas
B.naval exercise areas
C.underwater cables
D.recommended track lines
A.A regulated anchorage
B.Fish trap areas
C.An area closed to the public
D.Underwater cables
最新試題
The shoreline on charts generally represents the mean（）.
The soundings on the chart are based on the depth of water available at （）.
Which chart symbol indicates the bottom is clay（）.
Particular care is needed when navigating in the vicinity of（）as very few of these features have been fully surveyed to modern standards to determine their correct position，full extent，or the least depth over them.
Which information is found in the chart title（）.
The maximum difference between mean time and apparent time is （）.
The arrangement of charts in the catalogue is（）.
What is NOT an advantage of the rhumb line track over a great circle track? （）
（）is not a position-fixing system.
The only cylindrical chart projection widely used for navigation is the （）.