GMDSS. FCC Test 40 – Online Maritime Tests

When Inmarsat-A and Inmarsat-C terminals are compared:

Inmarsat-C antennas are smaller, with passive non-parabolic antennas but no rewind capability.
Inmarsat-A antennas are larger, with passive non-parabolic antennas that require rewind capability.
Inmarsat-C antennas are smaller, with active parabolic antennas but no rewind capability.
Inmarsat-A antennas are larger, with parabolic antennas but no rewind capability.

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.
Provides for voice, telex, high- and low-speed data and compressed video communications.
Requires a stabilized directional antenna.
Is an analog-based system.

Which statement concerning Inmarsat-A and Inmarsat-C terminals is correct?

Inmarsat-C terminals require only GPS input to enable automatic satellite tracking.
Inmarsat-A terminals require AZ/EL setup and gyro input to enable automatic satellite tracking.
Inmarsat-A terminals require gyro and GPS input to enable automatic satellite tracking.
Inmarsat-C terminals require AZ/EL setup and GPS input to enable automatic satellite tracking.

Inmarsat-C provides for which of the following?

FM voice communications via satellite.
Two-way messaging and data communications on a store-and-forward basis.
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.

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 small, lightweight terminal used to transmit messages over high frequency (HF) bands to communicate through a satellite.
A satellite communications system that provides real-time connectivity.
A satellite communications system that also provides continuous Digital Selective Calling coverage for all ocean regions.

Which statement concerning Inmarsat-A and Inmarsat-C terminals is correct?

None of the above.
Inmarsat-A units do not require compandors for data communications but Inmarsat-C units do require compandors.
Both Inmarsat-A and Inmarsat-C units are capable of faxes and voice communications.
Both Inmarsat-A and Inmarsat-C units can send data as well as send messages to FAX machines.

When Inmarsat-A and Inmarsat-C terminals are compared:

Inmarsat-A antennas are parabolic and smaller for higher gain, while Inmarsat-C antennas are larger but omni-directional.
Inmarsat-C antennas are smaller but omni-directional, while Inmarsat-A antennas are parabolic for lower gain.
None of the above.
Inmarsat-A antennas are bulkier but omni-directional, while Inmarsat-C antennas are smaller and parabolic for aiming at the satellite.

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