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Subel. I
6 questions
Subelement I
Inmarsat Equip. & Comms:
Section 64
Inmarsat-FBB Equipment and Operations
How is a signal radiated from an Inmarsat-FBB system's antenna?
  • It is usually radiated in an omni-directional pattern, but an optional feature allows it to be directional for use when the vessel is on the fringe of the satellite's footprint.
  • Correct Answer
    It is a highly focused directional signal that must be beamed at the desired satellite.
  • It is radiated in an omni-directional pattern.
  • It is radiated in an omni-directional pattern that can be reversed by the Operator to attain directional beaming to an alternate satellite.
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Inmarsat FBB coverage is provided by?
  • 66 satellites in near-polar orbits.
  • The same four satellites that provide Inmarsat-C coverage.
  • Correct Answer
    There are four footprints not all of which are identical to Inmarsat-C coverage.
  • 6 geo-stationary satellites to provide coverage in all navigable waters.
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How does an FBB terminal notify shore authorities of a Distress situation with priority pre-emption?
  • Dial 505 on the keypad to request an “SOS” voice call.
  • Dial 505 on the keypad to make a pre-emptive priority Distress call.
  • Press the dedicated Distress Alert button on the FBB handset.
  • Correct Answer
    Press the dedicated Distress Alert button on the connected Maritime Safety Terminal.
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What features in a Maritime Safety Terminal (MST) are required for FBB units to meet GMDSS requirements?
  • Correct Answer
    Distress Alert button, keyboard and either printer or dedicated display/memory..
  • Printer, keyboard and 505 Distress menus on the keypad.
  • Printer, Distress Alert button and dedicated EGC receiver.
  • FBB units do not require Maritime Safety terminals to be compliant.
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How does an FBB terminal fully meet compulsory GMDSS requirements?
  • All FBB terminals are automatically certified under GMDSS by the IMO.
  • FBB terminals are not certified for use by GMDSS compulsory vessels.
  • The FBB terminal is replaced by a Maritime Safety Terminal, Distress Alert button, keyboard and printer.
  • Correct Answer
    The addition of a Maritime Safety Terminal, Distress Alert button, keyboard and printer or dedicated display.
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When engaging in voice communications via an Inmarsat-FBB terminal, what procedures are used?
  • Correct Answer
    CODECs may be used to digitize the voice signal.
  • Noise-blanking must be selected by the operator.
  • The voice signal must be compressed to fit into the allowed bandwidth.
  • The voice signal will be expanded at the receiving terminal.
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