7-A-063: INMARSAT: General System Operations
7-63I1:
What is an MRN?
Message Reference Number, provided by the CES.
Mobile Registration Number, provided by the FCC.
Mobile Registration Number, provided by IMO.
Vessel's call sign
7-63I2:
To keep the Inmarsat-B antenna pointing at the desired satellite, regardless of the ship's position and course, it has an input from the vessel's:
Gyrocompass
Operational radar
Automated Radar Plotting Aid (ARPA) equipped radar
Steering control system
7-63I3:
The Inmarsat telephone and TELEX communications channel usage scheme is:
One ship per telephone channel and many ships per TELEX channel.
Many ships on the same TELEX analog channel frequency and many ships on the same TDM telephone channel.
One ship per analog telephone channel and one ship per TELEX analog channel frequency.
One ship per channel whether telephone or TELEX.
7-63I4:
What is an Inmarsat "Subscriber Number"?
This is the Inmarsat number that is assigned to a unit for incoming calls.
This identifies the vessel's selective calling (SELCALL) number.
This is the vessel's Inmarsat registration number for accounting authority purposes.
This number is used for receiving news and other optional services in FleetNETTM.
7-63I5:
Which of the following statements concerning Inmarsat geostationary satellites is true?
They provide coverage to vessels in nearly all of the world's navigable waters.
They are in a polar orbit, in order to provide true global coverage.
They are in an equatorial orbit, in order to provide true global coverage.
Vessels sailing in equatorial waters are able to use only one satellite, whereas other vessels are able to choose between at least two satellites.
7-63I6:
What is meant by "CES"?
Coast Earth Station
Coast Earth Satellite
Central Equatorial Station
Coastal Equivalent Station
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Color key:
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● = Unseen
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● = Weak
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● = Review
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● = Learned
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● = Incorrect answer
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