單項選擇題When latitude and longitude are used，these shall be expressed in（）（and decimals of a minute if necessary），north or south of the Equator and east or west of Greenwich.

A.Fathoms and meters
B.Miles and kilometers
C.Arc and degrees
D.Degrees and minutes


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1.單項選擇題What is an ebb current（）.

A.A current at minimum flow
B.A current coming in
C.A current going out
D.A current at maximum flow

2.單項選擇題What is a lighted safe water mark fitted with to aid in its identification（）.

A.A spherical topmark
B.Red and white retroreflective material
C.A sequential number
D.A red and white octagon

3.單項選擇題What describes a flood current（）.

A.Horizontal movement of the water toward the land after high tide
B.Horizontal movement of the water toward the land after low tide
C.Horizontal movement of the water away from the land following high tide
D.Horizontal movement of the water away from the land following low tide

4.單項選擇題What area of the earth cannot be shown on a standard Mercator chart（）.

A.Equator
B.Areas including both North and South latitudes
C.North and South Poles
D.A narrow band along the central meridian

5.單項選擇題Traffic separation schemes adopted by the IMO are listed in（）.

A.NM
B.Ship's Routing
C.Colreg
D.Solas