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Direct or space wave (line of sight) propagation in the VHF and UHF bands mainly involve:
AIS, SART, EPIRB, Inmarsat Fleet communications.
MF communications only.
NAVTEX broadcasts.
HF communications only.
For what period of time should an EPIRB be able to operate on its batteries to meet the regulations relating to GMDSS?
36 hours.
24 hours.
48 hours.
96 hours.
How should a satellite antenna be mounted for approval in the GMDSS?
As near the transmitter as possible.
As high as possible.
With free line of sight in every direction.
Midships.
In relation to GMDSS what does the acronym MSI stand for?
Maritime Service Information.
Maritime Surface Information.
Maritime Safety Information.
Maritime Security Information.
In relation to GMDSS what does the acronym RCC stand for?
Research Coordinating Centre.
Resource Coordinating Centre.
Rescue Coordination Centre.
Retransmitting Coordinating Centre.
In which sea area are vessels required to carry either INMARSAT or HF equipment, or combination of both under GMDSS?
A3.
A4.
A3 and A4.
All sea areas.
On which VHF DSC channel should all GMDSS equipped ships keep watch?
Channel 13.
2 187.5 kHz.
Channel 16.
Channel 70.
What does the acronym GMDSS stand for in relation to communications on board ships?
Global Maritime Distress Surface Search.
Global Maritime Distress and Safety System.
Global Maritime Disaster Search System.
Global Maritime Digital Safety System.
What is Tropospheric Propagation?
It is the propagation of a ground wave directly after reflecting from earth’s surface to the stratosphere of the earth.
It is the propagation of a space wave directly or after reflecting from earth’s surface to the troposphere surface of the earth.
It is the propagation of a sky wave directly after reflecting from earth’s surface to the ionosphere surface of the earth.
It is the propagation of a relay wave directly or after reflecting from earth’s surface to the stratosphere surface of the earth.
What is the coverage of Inmarsat’s geostationary satellites in relation to GMDSS?
Global, except the polar areas.
Global, including the polar areas.
The Atlantic, Indian and Pacific oceans.
The Atlantic, Indian and Pacific oceans and the polar areas.
What is the most important factor for the range of a VHF radio station?
The output power.
The height of the antenna.
The power supply.
The size of the antenna.
What is the most important factor for the range of a HF radio station?
The output power.
The height of the antenna.
The frequency.
The size of the antenna.
What is the name of the international convention, that regulates GMDSS?
STCW.
MMSI.
SOLAS.
GMDSS.
What is the propagation path taken by the radio signal on the VHF Channel 16?
Direct wave (line of sight).
Ground wave.
Sky wave.
Space wave.
What is the two-digit “Special Access Code” or “Short Access Code” or “SAC”, designated for maritime safety services, when requesting for medical advice under the context of GMDSS?
32.
38.
39.
40.
What is the two-digit “Special Access Code” or “Short Access Code” or “SAC”, designated for maritime safety services, when requesting for Search and Rescue (SAR) assistance under the context of GMDSS?
42.
41.
39.
40.
What should be the very first step for a GMDSS radio operator to take, when initiating a distress priority message via Inmarsat Fleet terminal?
Pressing the “Distress Button” or “Distress Hot Key” on the equipment.
Contacting the CES operator and informing about the distress condition.
Dialing the correct code on the telephone remote unit.
Contacting the CES operator by using the radiotelephone distress procedure.
Which VHF channel should be used for bridge-to-bridge communications, concerning safety of navigation and manoeuvring in the GMDSS?
Channel 08.
Channel 13.
Channel 16.
Channel 70.
Which is the distress and safety frequency for MF DSC?
2 182 kHz.
2 187.5 kHz.
8 291 kHz.
8 414.5 kHz.
Which one of the certificates given in the options is required to be held by an operator on a GMDSS ship trading in all sea areas?
GOC.
MOC.
ROC.
DSC.
Which one of the following EPIRB transmits a distress alert, that is received and relayed by Inmarsat satellites globally?
406 MHz EPIRB.
Class-A EPIRB.
Class-B EPIRB.
Class-E EPIRB.
Which one of the following Inmarsat services has the exceptional features of “Prioritization” and “Pre-emption” in the Global Maritime and Safety System (GMDSS)?
Inmarsat-Fleet 77.
Inmarsat-Fleet 55.
Inmarsat-Fleet 33.
Inmarsat-Mini M.
Which one of the given options best completes the following statement. “In relation to GMDSS, F1B is used for”:
Distress communications on 2 182 kHz.
VHF telephony.
SSB radiotelephony.
TLX radio telex.
Which one of the given options best completes the following statement. “In relation to GMDSS, F3E is used for”:
Distress communications on 2 182 kHz.
VHF telephony.
SSB radiotelephony.
TLX radio telex.
Which one of the given options best completes the following statement. “In relation to GMDSS, J3E is used for”:
Distress communications on 2 182 kHz.
VHF telephony.
SSB radiotelephony.
TLX radio telex.
Which one of the given options best completes the following statement. “In relation to GMDSS, sea area A1 means an area”:
Within coverage of, at least, one Coast Station with VHF DSC and telephony.
Within 30 nautical miles from the coast.
Within 150 nautical miles from the coast.
Coastal water in sight of a Coast Station.
Which one of the given options best completes the following statement. “In relation to GMDSS, sea area A2 means an area”:
Within coverage of, at least, one Coast Station with MF DSC and telephony.
Within Radar coverage of, at least, one Coast Earth Station.
Within 150 nautical miles from the coast.
Coastal water in sight of a Coast Station.
Which one of the given options best completes the following statement. “In relation to GMDSS, sea area A3 means an area”:
In one of the three major oceans.
That is global.
That is further out, then 150 nautical miles from the coast.
Within coverage of an Inmarsat geostationary satellite.
Which one of the given options best completes the following statement. “In relation to GMDSS, sea area A4 means an area”:
Which is outside the ordinary ship traffic routes.
That is global.
With no ordinary radio communications.
Which is outside areas A1, A2 and A3.
Which one of the given options best completes the following statement. “One of the most important advantages with GMDSS is that”:
A ship can always communicate via satellite.
A ship can always communicate via radio telex.
Every ship has the same equipment.
A ship in distress should always be able to send a ship-to-shore distress alert.
Which one of the given options best completes the following statement. “Ship-to-ship distress alerting is primarily based on”:
Satellite communications.
Digital selective calling in the VHF and MF bands.
Mobile telephones.
VHF telephony.
Which one of the phrases, given in the options, most accurately completes the following statement? Among the services, provided by Inmarsat-Fleet 77 in the context of Global Maritime Distress and Safety System (GMDSS), the foremost is:
Global mobile voice and flexible data communications services.
High speed fax only.
Telex services.
Store and forward messaging only.
Which one of the phrases, given in the options, most accurately completes the following statement? The Inmarsat system communicates through:
Space wave.
A combination of ground wave and sky wave.
Ground wave.
Sky wave.
Which one of the phrases, given in the options, most accurately completes the following statement? The propagation path, used by HF signals, from the SSB radio transceiver to achieve long-range communications, is:
The sky wave.
The ground wave.
Relay wave.
Direct wave (line of sight).
Which one of the phrases, given in the options, most accurately completes the following statement? The two-digit codes, that are designated for maritime safety and general services are referred as:
Special Access Codes or Short Access Codes.
Safety Access Codes.
General Access Codes.
Routine Access Codes.
Which one of the phrases, given in the options, most accurately completes the following statement? When selecting a HF band for a particular range, the one important advice is:
To select a higher frequency in the band by day, and lower frequency in the night.
To select a lower frequency in the band by day, and higher frequency in the night.
To select a higher frequency in the band by day and night.
To select a lower frequency in the band by day and night.
Which one of the systems given in the options most accurately completes the following statement? In the Global Maritime Distress and Safety System (GMDSS), the ISDN (Integrated Services Digital Network) and MPDS (Mobile Packet Data Service) data communication facility is available using:
Inmarsat-Fleet 77.
Inmarsat-A.
Inmarsat-B.
Inmarsat-C.
Which piece of equipment on the bridge is used for locating a SART?
3 cm (9 GHz) Radar.
Radio Direction Finder.
10 cm (3 GHz) Radar.
Why is Channel 16 a simplex channel under the GMDSS context?
Every ship within coverage should be able to hear and communicate.
It is cheaper.
Simplex is less sensitive to interference than duplex.
Not every country provides duplex service.
Why should the SART be mounted as high as possible in the survival craft in relation to GMDSS?
To protect the SART from sea spray.
The flashlight should be easily discovered by a rescuer.
To protect the people in the survival craft from radiation.
To increase the range.
You have received the 9-digit MMSI of a ship in distress. In which ITU publication can you find the name of the ship?
List of ship stations.
List of ship names.
List of radio determination and special service stations.
List of call signs and numerical identities.
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