A.the differing light colors
B.one system having odd numbers while the other system has even numbers
C.one system using horizontal bands while the other system uses vertical stripes
D.the difference in the periods of the light
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A.the light-house
B.the anchorage
C.the pilot station
D.the light-buoy
A.deep laded vessels
B.deeply load vessels
C.deep loading vessels
D.deeply loaded vessels
A.small circle
B.great circle
C.rhumb line
D.hyperbola
A.untrue
B.impossible
C.suspectful
D.unimportant
A.date of construction or establishment
B.length of time between flashes of the light
C.time required for the longest flash of each cycle
D.time required for the light to complete each cycle
最新試題
A celestial body will cross the prime vertical circle when the latitude is numerically （）.
Which buoy will NOT display white retro reflective material（）.
Traffic separation schemes adopted by the IMO are listed in（）.
When navigating a vessel，you（）.
（） is a circular traffic lane used at junctions of several routes，within which traffic moves counterclockwise around a separation point or zone.
The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the（）.
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.
Which statement concerning current is TRUE（）.
When entering a channel from seaward，the numbers on buoys（）.
You should plot your dead reckoning position（）.