更多"The apparent wind can be zero when "的相关试题:
[单项选择]The apparent wind’s speed can be zero only when two conditions are present. One condition is that the true wind（）.
A. must be from dead ahead
B. speed must be zero
C. must be from dead astern
D. must be on the beam
[单项选择]Apparent wind speed blowing across a vessel under tow can be measured by a(n)（）.
A. barometer
B. wind vane
C. anemometer
D. thermometer
[单项选择]Apparent wind speed blowing across a ship under tow can be measured by a(n)（）.
A. barometer
B. wind vane
C. anemometer
D. thermometer
[单项选择]In most cases，the direction of the apparent wind lies between the bow and（）.
A. the direction of the true wind
B. true north
C. the beam on the windward side
D. the beam on the lee side
[单项选择]A vessel is overtaking when she can see which light(s) of a vessel ahead?（）
A. Only the stern light of the vessel
B. One sidelight and a masthead light of the vessel
C. Only a sidelight of the vessel
D. The masthead lights of the vessel
[单项选择]When can routine communications be resumed when radio silence has been imposed?（）
A. After determining that the frequency or channel appears to be no longer in use
B. After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C. Routine communications can resume after the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D. If，in the Master's opinion，communications on that frequency will interfere with emergency communications
[单项选择]When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）
A. After determining that the frequency or channel appears to be no longer in use
B. After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C. After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D. Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
[单项选择]Which statement is TRUE when comparing cold and warm fronts?（）
A. Cold fronts are more violent and of shorter duration
B. Cold fronts are milder and last longer
C. They are very similar with the exception of wind direction
D. Warm fronts are more violent and of longer duration
[单项选择]What is TRUE when operating in fog and other vessels are detected by radar?（）.
A. You should make an ample change to port for a vessel crossing on the starboard bow
B. You should maneuver in ample time if a close-quarters situation is developing
C. You should determine the course and speed of all radar contacts at six minute intervals
D. Long-range scanning will provide early warning of ALL other vessels within the radar's range
[单项选择]When changing from a compass course to a true course you should apply（）.
A. variation
B. deviation
C. variation and deviation
D. a correction for the direction of current set
[单项选择]A true bearing of a charted object，when plotted on a chart，will establish a （）.
A. fix
B. line of position
C. relative bearing
D. range
[单项选择]If in doubt as to the true water level when a boiler is being oil-fired, you should （）.
A. take no measures
B. extinguish the fire as soon as possible
C. feed water to the boiler
D. open the blow down valve
[单项选择]When order spare part, you can directly fall back on （）
A. the manager
B. your agent
C. the PSCO
D. the master
[多项选择]What two choices can you make when redundancy is required from a branch office to a regional office?（）
A. multiple Frame Relay PVCs
B. dualWan links to the regional office
C. dualWan links to another branch office
D. single links - one to the regional office and one to another branch office
[单项选择]When making landfall at night，you can determine if a light is a major light or an offshore buoy by（）.
A. the intensity of the light
B. checking the period and characteristics against the Light List
C. the color，because the buoy will have only a red or a green light
D. Any of the above can be used to identify the light
[单项选择]A body can only be observed at lower transit when（）.
A. the declination is the opposite name to the latitude
B. the algebraic sum of the colatitude and declination exceeds 90
C. the observer is in high latitudes above either polar circle
D. the body is circumpolar
[单项选择]A ship can request completion of a （） when the ship is at a higher security level than the port facility or another ship it is interfacing with.
A. DOC
B. DOS
C. SSP
D. SMC
[单项选择]When visibility is restricted（），we can say it is restricted visibility.
A. by long distance
B. by the darkness at night
C. by a vessel in front
D. by fog or falling snow
