GMDSS. FCC Test 46

A vessel with an 18-hour ETA to the Panama Canal on a voyage from Miami loses the ability to communicate via Inmarsat. The most likely cause is?

The vessel has sailed beyond the coverage area of the Western Atlantic satellite.
The vessel has sailed beyond the coverage area of the Eastern Atlantic satellite.
The vessel has sailed beyond the coverage area of the Southbury Shore Station.
An equipment fault.

What can be the visual observation of a condition whereby it may be possible to initiate a reliable telex transmission but a voice transmission may not be possible?

An indication on a meter or on the display terminal of high transmit power.
An indication that the antenna has reached its maximum travel in one direction.
An indication of a very high antenna elevation on the display terminal screen.
An indication on a meter or on the terminal of low receiver signal strength.

Which of the following statement concerning EGC configuration is false?

The originator of MSI information cannot specify receipt only by vessels within a specific geographical area, circular or rectangular.
GMDSS operators generally can select additional NAVAREAS to acquire EGC messages of interest to the vessel.
NAVAREA selection should be monitored and appropriately updated.
The originator of MSI information can specify receipt only by vessels within a specific geographical area, circular or rectangular.

What additional equipment provides the maximum availability for receiving SafetyNET broadcasts when the associated Inmarsat-C is being used for telex communications?

Automatic switching between Inmarsat-C and EGC functions.
HF SSB can be used to receive voice MSI broadcasts.
An integrated EGC receiver with the existing Inmarsat-C equipment.
A separate EGC receiver.

What is the equipment arrangement that provides the maximum availability for reception of MSI broadcasts when using Inmarsat-C for telex communications?

Automatic switching between Inmarsat-C and EGC functions.
Redundancy using HF SSB to receive voice broadcasts.
Separate EGC receiver.
Integrating ECG receiver with the existing Inmarsat-C equipment.

A vessel, before transiting the Panama Canal, on a voyage from San Diego to Miami, loses the ability to communicate via Inmarsat. The most likely cause is:

The vessel has sailed beyond the coverage area of the Western Atlantic satellite.
The vessel has sailed beyond the coverage area of the Pacific satellite.
The satellite orbit is beyond the usable range of the SES.
The vessel has sailed beyond the coverage area of the Southbury Shore Station.

Upon receipt of SafetyNET messages of the distress or urgency category on the ship's EGC receiver, what action is required by the GMDSS Radio Operator?

No immediate action is required by the operator since the transmission will be automatically acknowledged by the receiving vessel.
No immediate action is required as an audible tone will be generated at the beginning and end of the transmission and a paper printout of the message will be generated.
Manually reset the alarm.
A periodic alarm tone will be heard until the radio operator prints the message from the unit's memory.

What maintenance function may the holder of a GMDSS Radio Operator license perform, or supervise the performance of, on an Inmarsat-C SES?

None of these.
Remove stack deposits and other debris from the radome preventing degraded performance.
Adjust the station's EIRP.
Adjust a reference oscillator or synthesizer.

What can be defined as the service that allows terrestrial information providers to send general information messages to pre-defined groups of subscribers?

FleetNET.
COSPAS-SARSAT.
SafetyNET.
InfoNET.

Review Answers

GMDSS. FCC Test 46

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