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Subel. E
6 questions
Subelement E

Survival Craft Equip & S.A.R.:

Section 30

EPIRB System Structure and Operation:

Which is not a function of a satellite under COSPAS-SARSAT using satellite EPIRBs?

  • Relayed satellite message includes the EPIRB ID number which provides a reference for retrieval of vessel information from the shore database.
  • Doppler shift of EPIRB signal is measured and the EPIRB's position is calculated.
  • Information received from EPIRBs is time-tagged and transmitted to any Local User Terminal in the satellite's view.
  • Correct Answer
    After the EPIRB's position is calculated using the Doppler shift COSPAS-SARSAT satellites provide follow-on SAR communications.
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Which of the following satellite systems is of particular & dedicated importance to search and rescue missions under GMDSS?

  • Correct Answer
    COSPAS/SARSAT
  • Inmarsat
  • GPS
  • Iridium
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Which of the following statements concerning COSPAS-SARSAT is false?

  • 406 MHz EPIRBs are units that are used as alerting devices.
  • Correct Answer
    Doppler frequency measurements provide more precise locations than GPIRB signals.
  • The Doppler frequency measurement concept is used to determine the EPIRB's location.
  • Satellites in a low-earth polar orbit detect EPIRB beacons on 406 MHz and relay the information to a Local User Terminal (LUT).
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Which of the following statements concerning COSPAS-SARSAT is false?

  • EPIRBs, ELTs, and PLBs use the system primarily for Distress alerting.
  • These satellites monitor 406 MHz for EPIRB signals.
  • Correct Answer
    After initiating a call request and selecting the LES, these satellites may be used for commercial messages.
  • These satellites use Doppler shift measurement to determine the location of the beacons.
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Which of the following statements concerning the EPIRB system is true?

  • GOES weather satellites will provide alerting with complete worldwide coverage.
  • COSPAS-SARSAT satellites always provides an alert and position report within 10 minutes of reception.
  • Correct Answer
    The Inmarsat system will not provide alerts and position report for 406 MHz EPIRBs equipped with GPS receivers.
  • The GPS satellite system will relay an alert and position report within 20 minutes of reception.
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Which of the following statements concerning satellite EPIRBs is true?

  • The coded EPIRB signal identifies the nature of the Distress situation.
  • The coded EPIRB signal only identifies the vessel's name and port of registry.
  • If the GMDSS Radio Operator does not program the EPIRB, it will transmit default information such as the follow-on communications frequency and mode.
  • Correct Answer
    Once activated, these EPIRBs transmit a signal for use in identifying the vessel and for determining the position of the beacon.
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