Element 7: GMDSS Radio Operating Practices

effective 8/01/2006

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7-A-066: INMARSAT-C Equipment and Operations

7-66I1: Which of the following best describes Inmarsat-C operation?

Is a digital store-and-forward system that also provides Enhanced Group Call, data reporting, polling and Distress alerting capabilities.

Is an analog-based system.

Requires a stabilized directional antenna.

Provides for voice, TELEX, high- and low-speed data and compressed video communications.



7-66I2: Which of the following best describes a shipboard Inmarsat-C system?

A small, lightweight terminal capable of providing satellite store-and-forward message communications.

A satellite communications system that provides real-time connectivity.

A small, lightweight terminal used to transmit messages over high frequency (HF) bands to communicate through a satellite.

A satellite communications system that also provides continuous Digital Selective Calling coverage for all ocean regions.



7-66I3: Which of the following modes of communications are available when using Inmarsat-C?

TELEX and e-mail

Fax

14400 BPS Data

Voice



7-66I4: Which mode of communication is possible through an Inmarsat-C SES?

TELEX and e-mail

SITOR

Radiotelephone

DSC



7-66I5: It is possible to transmit all of the following via Inmarsat-C from a vessel except?

Voice

TELEX

Text for delivery by fax.

Comtex mail and x.400 data services



7-66I6: Which of the following best describes the full range of services provided by the Inmarsat-C Satellite system?

Polling, enhanced group call, one-way position and data reporting via satellite, two-way messaging and data communications on a store-and-forward basis.

Polling, enhanced group call, and one-way position and data reporting via satellite.

FM voice communications via satellite.

Two-way messaging and data communications on a store-and-forward basis.





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7-A-065: INMARSAT-C Equipment and Operations
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Element 7: GMDSS Radio Operating Practices
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7-A-067: Compare & Differentiate "B" & "C" Terminals