單項選擇題

All straight lines represent great circle tracks on a chart based on a(n) （）.

A.Mercator projection
B.polyconic projection
C.orthographic projection
D.gnomonic projection

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單項選擇題

Chart correction information is NOT disseminated through the （）.

A.Summary of Corrections
B.Local Notice to Mariners
C.Daily Memorandum
D.Chart Correction Card

單項選擇題

Charted depth is the （）.

A.vertical distance from the chart sounding datum to the ocean bottom，plus the height of tide
B.vertical distance from the chart sounding datum to the ocean bottom
C.average height of water over a specified period of time
D.average height of all low waters at a place

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All straight lines represent great circle tracks on a chart based on a(n) （）.

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Chart correction information is NOT disseminated through the （）.

Charted depth is the （）.