A.boarding and operating procedures
B.maintenance schedule
C.navigational systems
D.fuel consumption rates
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A.laying a pipeline
B.dredging
C.mineclearing
D.not under command
A.location
B.height of light above water
C.luminous range
D.light characteristics
A.fuel
B.electricity
C.oxygen
D.heat
A.every station in one chain to transmit at the same time
B.each station to transmit without reference to another station
C.on-line transmission of single-line transmitters at the same time
D.each station to only depend on the master for synchronization and signal ratio
A.the rotation of the earth on its axis
B.convection currents caused by differences in radiant heating between equatorial and polar regions
C.mountain ranges
D.All of the above
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Air circulation is caused or affected by（）.
An icebreaker may use the code letter “K” to remind ships of their obligation to listen continuously on their radio. This signal may be made by any of the following EXCEPT（）.
All Loran-C transmitting stations are equipped with cesium frequency standards which permit （）.
In respect of carrier’s liabilities，responsibilities，rights and immunities the（）contained in the International Convention for the Unification of Certain Rules Relating to Bills of Lading，signed at Brussels on August 25，1924，shall be applied.
All OSV personnel should be familiar with survival craft（）.
In handling break bulk hazardous materials，it is forbidden to use（）.
An azimuth angle for a body is measured from the（）.
An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.
An example of a grade C product is（）.
An aneroid barometer on a boat should always be（）.