更多"When can routine communications be "的相关试题:
[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]Routine radio communications should be no more than（）.
A. one minute
B. three minutes
C. five minutes
D. eight minutes
[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
[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]The apparent wind can be zero when the true wind is from（）.
A. ahead and equal to the ship's speed
B. astern and equal to the ship's speed
C. ahead and equal to twice the ship's speed
D. astern and equal to twice the ship's speed
[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]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]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
[单项选择]（）20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions are possible.
A. As many as
B. So many as
C. As much as
D. As more as
[单项选择]When we write, we must write as（）as we can.
A. careful
B. carefully
C. more careful
D. more carefully
[单项选择]When out of sight of land, a ship’s position can be found by using（）.
A. the coastal navigation
B. the celestial navigation
C. traditional navigation
D. the great circle navigation
[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
[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]国家标准中规定常用高度方向的表面粗糙度评定参数有Ra、Rz和RY。一般情况下优先选用Ra，Ra是（）。
A. 微观不平度十点高度
B. 微观不平度
C. 轮廓最大高度
D. 轮廓算术平均偏差
[单项选择]电镀修复法形成的表面粗糙度Ra值（）热喷涂形成的表面粗糙度Ra值。
A. 小于
B. 大于
C. 远大于
D. 约等于
[判断题]当铸件表面粗糙度为Ra1.6μm，模具成型零件表面粗糙度为Ra0.4μm。（）
[单项选择]An appointment between vessels normally made on radio to meet in a certain area or position defines（）.
A. bona fide
B. rendez-vous
C. prima facie
D. action in personam
[单项选择]AN APPOINTMENT BETWEEN VESSELS NORMALLY MADE ON RADIO TO MEET IN A CERTAIN AREA OR POSITION defines（）.
A. Bona fide
B. Rendez-vous
C. Prima facie
D. Action in personam
