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GMDSS FINAL QUESTIONS AND ANSWERS
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GMDSS FINAL QUESTIONS AND ANSWERS
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GMDSS FINAL QUESTIONS AND ANSWERSYou receive a TELEX with the sender's I.D. of 433863491. What type of terminal sent
this message to your vessel? - Answers- Inmarsat-C
You receive a TELEX with the sender's I.D. of 436640927. What type of terminal sent
this message to your vessel? - Answers- Inmarsat-C
Which of the following would indicate an Inmarsat-C terminal? - Answers- 436682433
Which of the following would indicate an Inmarsat-C terminal? - Answers- 430346275
Which of the following would indicate an Inmarsat-C terminal? - Answers- 436682011
Which of the following would indicate an Inmarsat-C terminal? - Answers- A 9 digit
number always starting with 4.
What indication is given to the personnel in a survival craft of the approach of SAR
craft? - Answers- The SART may provide a visual or audible indication of interrogation
by a 3-cm radar.
What signal is detected as originating from an AIS SART and how is the signal
displayed? - Answers- An AIS SART signal is shown on any AIS receiver as a special
MMSI-like coded symbol.
How can vessel personnel detect the operation of a SART in its vicinity? - Answers- A
unique 3-cm signal consisting of a 12-dot pattern radiating outward from a SART's
position along its line of bearing.
What is not an advantage of an AIS SART signal when compared to a radar-based
SART signal? - Answers- The AIS SART can be detected much farther away than radar
SART models.
Which of the following statements concerning testing and maintenance of SARTs is
true? - Answers- Testing a SART should be done in a consistent manner & location to
ensure a baseline history of proper results.
Why is it important to limit the duration of testing a SART? - Answers- Testing in port or
even at sea may cause interference to other radars or a test signal may be
misinterpreted as a genuine Distress situation.
What statement is true regarding tests and maintenance that could be provided for the
SART? - Answers- Extreme care should be exercised because testing of the SART
may be received by other vessels, may be interpreted as a Distress condition, or it may
interfere with other vessels' safe navigation.
,Why should functional testing of a SART be minimized? - Answers- Potential
interference with safe navigation, possible misinterpretation of an actual Distress,
minimizes draining the battery.
Which is NOT a valid maintenance and testing function for a SART? - Answers-
Operational test with several vessels to determine effective transmitting range.
The SART is required to have sufficient battery capacity to operate in the stand-by
mode for what period of time? - Answers- Four days
Which is not a function of a satellite under COSPAS-SARSAT using satellite EPIRBs? -
Answers- After the EPIRB's position is calculated using the Doppler shift COSPAS-
SARSAT satellites provide follow-on SAR communications.
Which of the following satellite systems is of particular & dedicated importance to
search and rescue missions under GMDSS? - Answers- COSPAS/SARSAT
Which of the following statements concerning COSPAS-SARSAT is false? - Answers-
Doppler frequency measurements provide more precise locations than GPIRB signals.
Which of the following statements concerning COSPAS-SARSAT is false? - Answers-
After initiating a call request and selecting the LES, these satellites may be used for
commercial messages.
Which of the following statements concerning the EPIRB system is true? - Answers-
The Inmarsat system will not provide alerts and position report for 406 MHz EPIRBs
equipped with GPS
receivers.
Which of the following statements concerning satellite EPIRBs is true? - Answers-
Once activated, these EPIRBs transmit a signal for use in identifying the vessel and for
determining the
position of the beacon.
What features may be found on GMDSS satellite EPIRB units? - Answers- Float-free
release bracket, strobe light & Distress alert transmission on 406 MHz.
What feature is not a component of a 406 MHz satellite EPIRB? - Answers- Aural
locator signal.
What statement is true regarding 406 MHz EPIRB transmissions? - Answers- Transmits
a unique hexadecimal identification number.
Which of the following would most likely not prevent a SART's signal from being
detected? - Answers- The SART was properly mounted in the lifeboat and rescue
personnel were monitoring the 3-CM radar.
, How can a SART's detection and effective range be maximized? - Answers- The SART
should be held or mounted as high as possible and in a vertical position.
Which statement is NOT true regarding the SART? - Answers- This is a 6 GHz
transponder capable of being received by a vessel's X-band navigational radar system.
At what point does a SART begin transmitting? - Answers- If it has been placed in the
"on" position, it will respond when it has been interrogated by a 9-GHz radar signal.
A SART's signal cannot be detected: - Answers- By a search vessel's 10 cm Radar.
How does the searching vessel's radar interrogate a survival craft SART? - Answers-
The SART responds automatically and transmits the 12-blip signal when it detects the
search craft or other vessels' X-Band radar signal.
What radar display changes indicate the correct approach to a SART and what care
should be taken in a SAR situation? - Answers- The line of dots indicate the SART's
position, the dots become increasing arcs as the distance to the SART lessens,
rescuing vessels should reduce speed as the arcs get greater in degree.
How can rescue personnel detect that a SART is transmitting in the immediate vicinity?
- Answers- The SART's dots on the PPI will become arcs and then eventually become
concentric circles.
Which of the following is normally part of 406 MHz satellite EPIRBs? - Answers- A 5-
watt 406-MHz alert beacon, Automatic Hydrostatic Release (ARM), strobe light.
Which of the following statements concerning EPIRBs is false? - Answers- The
Inmarsat system provides worldwide coverage for Distress alerts.
Which of the following EPIRBs is most likely to be used to transmit a Distress alert
signal? - Answers- 406 MHz EPIRBs
Which of the following would best be used for visual detection of a distressed vessel? -
Answers- An EPIRB's strobe light.
Which piece of required GMDSS equipment is the primary source of transmitting
locating signals? - Answers- An EPIRB transmitting on 406 MHz.
What may be used as a homing signal by the search and rescue vessels in the
immediate vicinity of the ship in Distress? - Answers- A 121.5 MHz emergency
transmitter in a satellite EPIRB.
What part of a satellite EPIRB may function as a visual aid to rescue vessels? -
Answers- Strobe light
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