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GMDSS

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About this collection

The USCG bank covers deck subjects, navigation, navigation problems, rules of the road, GMDSS and other areas. Open a specific collection for focused preparation.

“USCG — GMDSS” contains 594 questions across 1 collection.

Learning

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Sample questions and answers

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What is the fundamental concept of the GMDSS?

One correct answer

  • a) It is intended to automate and improve emergency communications in the maritime industry✓ Correct answer
  • b) It is intended to automate and improve existing digital selective calling procedures and techniques
  • c) It is intended to provide more effective but lower cost commercial communications
  • d) It is intended to provide compulsory vessels with a collision avoidance system when they are operating in waters that are also occupied
How many total frequencies are available for DSC Distress alerting?

One correct answer

  • a) One
  • b) Two
  • c) Five
  • d) Seven✓ Correct answer
Which system has the least effective radius of operation?

One correct answer

  • a) HF SITOR
  • b) MF NBDP
  • c) VHF DSC✓ Correct answer
  • d) NAVTEX
The proper sequence of emissions corresponding to the sequence AM-Voice DSB, SSB-Voice without carrier, USB-Voice with carrier and FM-Voice, is:

One correct answer

  • a) A3E, H3E, J3E, F3E
  • b) A3E, J3E, H3E, F3E✓ Correct answer
  • c) J3E, H3E, A3E, F3E
  • d) H3E, A3E, J3E, F3E.
What statement is true regarding the exchange between two parties engaged in SITOR communications?

One correct answer

  • a) In ARQ, each character is transmitted twice, with the second displaced in time from the first
  • b) In ARQ, the "sending" station transmits a block of three characters and the "receiving" station responds with a one character Repeat Request. Following this the "transmitting" station will send a new block
  • c) In ARQ, the ISS transmits a block of 3 characters and the IRS checks for parity. If the received block is correct a one-character control signal is sent notifying the ISS to proceed with the next block. If the parity check fails the block must be resent✓ Correct answer
  • d) Broadcasts of Maritime Safety Information, traffic lists, etc. can be copied by the receiving station in ARQ mode.

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