1-C-18: Equipment Faults
1-18C1:
Under normal circumstances, what do you do if the transmitter aboard your ship is operating off-frequency, overmodulating or distorting?
Stop transmitting.
Reduce to low power.
Reduce audio volume level.
Make a notation in station operating log.
1-18C2:
Which would be an indication of proper operation of a SSB transmitter rated at 60 watt PEP output?
In SITOR communications, the power meter can be seen fluctuating regularly from zero to the 60 watt relative output reading.
In SSB (J3E) voice mode, with the transmitter keyed but without speaking into the microphone, power output is indicated.
In SSB (J3E) mode, speaking into the microphone causes power meter to fluctuate slightly around the 60 watt reading.
A steady indication of transmitted energy on an RF Power meter with no fluctuations when speaking into the microphone.
1-18C3:
If a ship radio transmitter signal becomes distorted:
Cease operations.
Reduce transmitter power.
Use minimum modulation.
Reduce audio amplitude.
1-18C4:
What would be an indication of a malfunction on a GMDSS station with a 24 VDC battery system?
A constant 30 volt reading on the GMDSS console voltmeter.
After testing the station on battery power, the ammeter reading indicates a high rate of charge that then declines.
After testing the station on battery power, a voltmeter reading of 30 volts for brief period followed by a steady 26 volt reading.
None of the above.
1-18C5:
Your antenna tuner becomes totally inoperative. What would you do to obtain operation on both the 8 MHz and 22 MHz frequency bands?
Bypass the antenna tuner. Use a straight whip or wire antenna approximately 30 ft long.
Without an operating antenna tuner, transmission is impossible.
It is impossible to obtain operation on 2 different HF bands, without an operating antenna tuner.
Bypass the antenna tuner and shorten the whip to 15 ft.
1-18C6:
Which of the following conditions would be a symptom of malfunction in a 2182 kHz radiotelephone system that must be reported to the Master, then logged appropriately.
No indication of power output when speaking into the microphone.
Much higher noise level observed during daytime operation.
When testing a radiotelephone alarm on 2182 kHz into an artificial antenna, the Distress frequency watch receiver becomes unmuted, an improper testing procedure.
Failure to contact a shore station 600 nautical miles distant during daytime operation.
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● = Weak
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● = Review
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● = Learned
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● = Incorrect answer
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