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Subelement A
VHF-DSC Equipment & Operation:
Section 2
Controls and Functions:
What is the purpose of the USA-INT switch?
  • To provide for simplex operations with European Public Correspondence stations.
  • To provide for duplex operations with U.S. Public Correspondence stations.
  • To change from duplex to simplex operation on designated channels in European waters.
  • Correct Answer
    To change from duplex to simplex operation on designated channels in U.S. waters.
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What may happen if the USA-INT control is left on INT when in U.S. waters?
  • Correct Answer
    Your signals will be heard but other station replies will not be heard on certain channels.
  • You will be able to communicate with public correspondence stations on Channel 5.
  • Other stations will not be able to hear your transmissions and you will not hear any signals.
  • You will not be able to operate on channel 13.
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What is the purpose of the Dual Watch function?
  • Allows simultaneous reception on two different channels.
  • Correct Answer
    To rapidly switch the radio's receiver between two channels.
  • Allows reception and transmission at the same time.
  • It allows you to monitor both sides of a public correspondence station's communication.
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What is the proper adjustment of the squelch control for maximum sensitivity?
  • Maximum clockwise rotation.
  • Maximum counterclockwise rotation.
  • Correct Answer
    Just below the point where the noise breaks through.
  • The squelch has no effect on the sensitivity.
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Which of the following transmitter power levels are permitted by FCC rules?
  • Low Power: 0.1 W, High Power: 5 W
  • Low Power: 0.5 W, High Power: 25 W
  • Correct Answer
    Low Power: 1 W, High Power: 25 W
  • Low Power: 5 W, High Power: 50 W
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Which of the following controls is not found on a VHF-DSC transceiver?
  • "Distress"
  • "Cancel"
  • "Squelch"
  • Correct Answer
    "R.I.T."
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