A.only one high and one low water occur during a lunar day
B.the high tide is higher and the low tide is lower than usual
C.the high tide and low tide are exactly six hours apart
D.two high tides occur during a lunar day
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A.bar securing a cargo port
B.centerline vertical bulkhead
C.deep beam
D.spanner stay
A.crossing
B.transit
C.transfer
D.passing
A.directional current
B.forward current
C.propeller current
D.wake current
A.Shift weight to the bow
B.Shift weight to the center of the boat
C.Shift weight to the stern
D.Throw excess weight overboard
A.Port
B.Commercial area
C.Berth
D.Roadstead
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