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Subelement A
General Information and System Overview.
Section 3
Sea Areas:
Which of the following regions lie outside Sea Areas A1, A2, and A3?
  • Sea Areas only apply to Inmarsat footprint areas.
  • Sea Area A3-I Inmarsat coverage and Sea Area A3-S HF SITOR (NBDP) coverage.
  • Correct Answer
    Sea Area A4
  • There are no additional Sea Areas.
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What sea area is defined as being within range of a shore-based MF station that provides for continuous DSC alerting?
  • Coastal waters
  • Sea area A3
  • Sea area A1
  • Correct Answer
    Sea area A2
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If a vessel is engaged in local trade and at no point in its voyage travels outside the range of a VHF shore station with continuous DSC alerting then the vessel is operating in what area?
  • Correct Answer
    Sea area A1
  • Coastal and international zones
  • Inland and coastal waters
  • Sea areas A1 and A2
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What is defined as an area, excluding sea areas A1 and A2, within the coverage of an Inmarsat geostationary satellite in which continuous alerting is available?
  • Ocean Area Regions AOR-E, AOR-W, POR or IOR
  • Correct Answer
    Sea Area A3
  • Sea Area A4
  • Coastal and Inland Waters

ยง 80.1069 Maritime sea areas.
(a) For the purpose of this subpart, a ship's area of operation is defined as follows:

(1) Sea area A1. An area within the radiotelephone coverage of at least one VHF coast station in which continuous DSC alerting is available as defined by the International Maritime Organization.

(2) Sea area A2. An area, excluding sea area A1, within the radiotelephone coverage of at least one MF coast station in which continuous DSC alerting is available as defined by the International Maritime Organization.

(3) Sea area A3. An area, excluding sea areas A1 and A2, within the coverage of an INMARSAT geostationary satellite in which continuous alerting is available.

(4) Sea area A4. An area outside sea areas A1, A2 and A3.

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SITOR (NBDP) equipment is a partial or alternate carriage requirement under GMDSS for vessels operating in which sea area(s)?
  • A1
  • Correct Answer
    A3 and A4
  • A1 and A2
  • A1, A2, A3 and A4
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What is defined as the area within the radiotelephone coverage area of at least one VHF coast station in which continuous DSC alerting is available as defined by the IMO regulation for GMDSS?
  • Ocean Area Regions AOR-E, AOR-W, POR or IOR
  • Sea Area A2
  • Correct Answer
    Sea Area A1
  • Coastal and Inland Waters
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