Section-I: Inmarsat Equip. & Comms: Key Topic #77: egc:

77I1 Upon receipt of SafetyNET^TM messages of the Distress or Urgency category on the ship's EGC receiver, what action is required by the GMDSS Radio Operator?

A. Manually reset the alarm.

B. 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.

C. No immediate action is required by the operator since the transmission will be automatically acknowledged by the receiving vessel.

D. A periodic alarm tone will be heard until the radio operator prints the message from the unit's memory.

77I2 What can be defined as the service that allows terrestrial information providers to send general information messages to pre-defined groups of subscribers?

A. SafetyNET^TM

B. FleetNET^TM

C. COSPAS-SARSAT

D. InfoNET

77I3 What additional equipment provides the maximum availability for receiving SafetyNET^TM broadcasts when the associated Inmarsat-C SES is engaged in communications?

A. An integrated EGC receiver with the existing Inmarsat-C equipment.

B. HF SSB can be used to receive voice MSI broadcasts.

C. A separate EGC receiver.

D. Automatic switching between Inmarsat-C and EGC functions.

77I4 Which of the following is utilized to transmit Enhanced Group Calls?

A. COSPAS satellite

B. HF SITOR (NBDP) shore stations

C. NAVTEX shore stations

D. Inmarsat satellite

77I5 What is the equipment arrangement that provides the maximum availability for reception of MSI broadcasts when using Inmarsat-C for TELEX communications?

A.. Separate EGC receiver.

B. Integrating EGC receiver with the existing Inmarsat-C equipment.

C. Redundancy using HF SSB to receive voice broadcasts.

D. Automatic switching between Inmarsat-C and EGC functions.

77I6 Which of the following statements concerning EGC configuration is false?

A. NAVAREA selection should be monitored and appropriately updated.

B. The originator of MSI information cannot specify receipt only by vessels within a specific geographical area, circular or rectangular.

C. The originator of MSI information can specify receipt only by vessels within a specific geographical area, circular or rectangular.

D. GMDSS operators generally can select additional NAVAREAS to acquire EGC messages of interest to the vessel.

Answers: 77I1 - A 77I2 - B 77I3 - C 77I4 - D 77I5 - A 77I6 - B

Section-I: Inmarsat Equip. & Comms: Key Topic #78: Equipment Faults and Maintenance-1:

78I1 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?

A. The vessel has sailed beyond the coverage area of the Southbury Land Earth Station.

B. The vessel has sailed beyond the coverage area of the Eastern Atlantic satellite.

C. The vessel has sailed beyond the coverage area of the Western Atlantic satellite.

D. An equipment fault resulting in a loss of signal from the satellite.

78I2 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:

A. The vessel has sailed beyond the coverage area of the Pacific satellite.

B. The vessel has sailed beyond the coverage area of the Southbury Shore Station.

C. The vessel has sailed beyond the coverage area of the Western Atlantic satellite.

D. The satellite orbit is beyond the usable range of the SES.

78I3 What can be the visual observation of a condition whereby it may be possible to initiate a reliable Inmarsat TELEX transmission but a voice transmission may not be possible?

A. An indication on a meter or on the display terminal of high transmit power.

B. An indication on a meter or on the terminal of low receiver signal strength.

C. An indication of a very high antenna elevation on the display terminal screen.

D. An indication that the antenna has reached its maximum travel in one direction.

78I4 What maintenance function may the holder of a GMDSS Radio Operator license perform, or supervise the performance of, on an Inmarsat-C SES?

A. Adjust the station's EIRP (power output ) for improved signal levels.

B. Enter Azimuth and Elevation values correctly so the Inmarsat-C SES can find the NCS CC.

C. Remove stack deposits and other debris from the antenna to prevent degraded performance.

D. Adjust a reference oscillator or synthesizer to tune the unit to the NCS CC.

78I5 What maintenance function may the holder of a GMDSS Radio Operator license perform, or supervise the performance of, on an Inmarsat-C SES?

A. Painting the antenna dome.

B. Adjust the station's EIRP.

C. Adjust any front panel controls.

D. Adjust a reference oscillator or synthesizer.

78I6 Which functions may the holder of a GMDSS Radio Operator License NOT perform on the Inmarsat-C equipment?

A. Maintain the antenna clear of soot, paint, etc.

B. Log-on, traffic and log-off functions.

C. Entry of position data and selection of LES.

D. Optimize performance by adjusting the transmitter EIRP.

Answers: 78I1 - D 78I2 - A 78I3 - B 78I4 - C 78I5 - C 78I6 - D