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Most modern Loran-C receivers，when not tracking properly，have a（n）______．
A.Bell alarm to warn the user
B.Lighted alarm signal to warn the user
C.Alternate signal keying system
D.View finder for each station
参考答案
更多 “ Most modern Loran-C receivers，when not tracking properly，have a（n）______．A.Bell alarm to warn the userB.Lighted alarm signal to warn the userC.Alternate signal keying systemD.View finder for each station ” 相关考题
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单选题The signal for fire alarm on a ship must be indicated（）.A
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单选题Traditionally，the signal for fire aboard ship is（）.A
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every station in one chain to transmit at the same timeB
each station to transmit without reference to another stationC
on-line transmission of single-line transmitters at the same timeD
each station to only depend on the master for synchronization and signal ratio
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单选题While working in the engine room, you hear seven short blasts followed by one long blast on the ships whistle, supplemented by the same signal on the general alarm bellsYou should （）.A
start the fire pump to charge the fire mainB
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abandon shipB
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单选题How can vessel personnel detect the operation of a SART in its vicinity?（）A
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A unique two tone warbling signal heard on VHF-FM ch-70C
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单选题The alarm signal for engine room catching fire is a blast of random bell follow by （）A
two knockB
three knocksC
four knocksD
five knocks
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单选题The radiotelegraph alarm signal may be used to announce（）.A
that a distress message will followB
a request for assistance in searching for a man overboardC
an urgent warning about a cycloneD
All of the above
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单选题Operation of the valve control release on a fixed CO2 system must immediately（）.A
release CO2 to the protected spaceB
secure all mechanical ventilation in the protected spaceC
sound the rig's general alarm signal for a fireD
sound an alarm in the ballast control room
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