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Worksheets1.2gmdss part3
Total questions: 20
Worksheet time: 10mins
Which of the following statements is true regarding Distress alerting under GMDSS?
A. Ship to shore Distress alerts are used to alert other ships in port of navigational hazards.
B. The Distress alert should identify the station in Distress and its position & time of position update. Also, the
alert may include the nature of the Distress, the type of assistance required, or the course and speed of the
mobile unit.
C. Ship-to-ship Distress alerts are used to alert other ships in the vicinity of navigational hazards and bad weather.
D. The vessel nearest to the emergency must notify the Coast Guard before leaving the vicinity.
If a MF-DSC Distress alert is transmitted what frequency is used for follow-on voice transmission?
A. 2182.0 kHz
B. 2760.0 kHz
C. 2187.5 kHz
D. 2174.5 kHz
What is meant by the acronym “EOS" in a DSC message?
A. Error Of Sequence
B. End Of Signals
C. Equal Operating Signals
D. End Of Sequence
Your ship received a Distress relay from a coast station on DSC VHF channel 70. What action should the
watch officer take?
A. Retransmit the DSC call on Ch-70 to other vessels in the vicinity.
B. Monitor Ch-06 to determine if there are any genuine Distress communications.
C. Monitor Ch-16 to determine if there are any genuine Distress communications.
D. Transmit a voice “Mayday Relay” call on Ch-13.
What action should you take after sending a false Distress alert on MF?
A. Make a voice announcement to cancel the alert on 2187.5 kHz.
B. Make a voice announcement to cancel the alert on 2182.0 kHz.
C. Make a voice announcement to cancel the alert on 2174.5 kHz.
D. Send another DSC alert and follow on with voice on 2182.0 kHz.
When can routine communications be resumed when radio silence has been imposed?
A. Routine communications can resume after the Rescue Coordination Center transmits a message on the
frequency or channel being used for emergency communications stating that such traffic has concluded.
B. After determining that the frequency or channel appears to be no longer in use.
C. After determining that geographic distance from the Distress situation will prohibit any other signal from
interfering with emergency communications.
D. If, in the master's opinion, communications on that frequency will interfere with emergency communications.
Which of the following situations would normally use the Urgency priority?
A. A crewmember falling over the side.
B. A serious medical situation involving a crewmember with potential loss of life.
C. An important meteorological warning concerning hazardous weather.
D. A cargo shift or weather situation considered to be of greater hazard than would justify a Safety priority
designation.
Which of the following situations would normally use the Voice designation "Securite"?
A. Messages concerning the Safety of Life At Sea (SOLAS).
B. Messages containing information concerning the Safety of a mobile unit or person.
C. Messages detailing important navigational warnings.
D. Messages concerning On-scene communications.
Which of the following frequencies is designated for On-scene Distress and Safety communications?
A. 4209.5 kHz
B. 2174.5 kHz
C. 518.0 kHz
D. 490.0 kHz
Which action is the most appropriate action for a GMDSS radio Operator to take in a Distress situation
where immediate help is needed, but the vessel is not sinking nor needs to be abandoned?
A. Transmit Distress calls by HF/MF/VHF DSC or Inmarsat.
B. Switch off EPIRB and SART manually.
C. Notify the RCC (Rescue Coordination Center) through VHF FM on channel 13.
D. Transmit Distress calls by activating the radiotelegraph automatic alarm signal.
Which of the following would most likely not prevent a SART's signal from being detected?
A. The rescue personnel were monitoring the 3-CM radar and the SART was mounted improperly in the lifeboat.
B. The SART was mounted improperly in the survival craft and rescue personnel were monitoring the 10-CM
radar.
C. The rescue personnel were monitoring the 10-CM radar and the SART was properly mounted in the lifeboat.
D. The SART was properly mounted in the lifeboat and rescue personnel were monitoring the 3-CM radar.
What radar display changes indicate the correct approach to a SART and what care should be taken in a
SAR situation?
A. The line of dots indicate the SART's position, the dots become increasing arcs as the distance to the SART
lessens, rescuing vessels should increase speed to reach Distress more quickly.
B. A line of dots on a radar screen rotates to indicate the SART's position along its line of bearing; rescuing
vessels should steer for the center of the line of dots.
C. 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.
D. The line of dots indicate the SART's position, the dots become decreasing arcs as the distance to the SART
lessens, rescuing vessels should reduce speed as the arcs lessen in degree.
Why is it important to limit the duration of testing a SART?
A. Excessive testing causes "burn in" on the vessel's radar display.
B. 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.
C. To prevent overheating, a SART requires sufficient ventilation that is significantly reduced when the SART is
being tested.
D. If another SART is testing at the same time, the two signals will cause damage to the unit that transmitted
them.
Which of the following satellite systems is of particular & dedicated importance to search and rescue
missions under GMDSS?
A. COSPAS/SARSAT
B. Inmarsat
C. GPS
D. Iridium
What feature is not a component of a 406 MHz satellite EPIRB?
A. 121.5 MHz emergency homing transmitter.
B. Emergency transmission on 406.025 MHz.
C. Float-free release bracket.
D. Aural locator signal.
Which piece of required GMDSS equipment is the primary source of transmitting locating signals?
A. Radio Direction Finder (RDF).
B. Survival Craft Transceiver.
C. An EPIRB transmitting on 406 MHz.
D. A SART transmitting on 406 MHz.
Equipment for radiotelephony use in survival craft stations under GMDSS must have what capability?
A. Operation on 457.525 MHz.
B. Operation on Ch-16.
C. Operation on 121.5 MHz.
D. Operation on Ch-70.
Which of the following channels is designated as the VHF follow-on communications channel and is
required in all portable survival craft equipment?
A. Ch-16
B. Ch-6
C. Ch-13
D. Ch-70
Which of these would be vital to a GMDSS SAR situation in polar regions?
A. GOES satellites to receive Distress Alerts and HF Voice for follow-on and SAR activity.
B. GOES satellites to receive Distress Alerts and Inmarsat Voice for follow-on and SAR activity.
C. Inmarsat satellites to receive Distress Alerts and HF Voice for follow-on and SAR activity.
D. COSPAS/SARSAT satellites to receive Distress Alerts and HF Voice for follow-on and SAR activity.
What information should be contained in a detailed Distress message that was not transmitted by an initial
Distress “hot-key” alert?
A. Vessel position, course & speed and the nature of Distress.
B. The distress vessel’s IMN and position at the time of alert.
C. Vessel name & call sign, POB and all potential means to communicate with the vessel.
D. Vessel name & call sign, distress vessel’s IMN & vessel position.
