C1 (301- 460)
GMDSS Safety Communications Quiz
Test your knowledge of Global Maritime Distress and Safety System (GMDSS) communications with this comprehensive quiz. Dive into key concepts, guidelines, and technical details to see how well you understand this critical aspect of maritime safety.
- 60 challenging questions
- Enhance your understanding of marine safety protocols
- Perfect for students, professionals, and enthusiasts
Choose from the following terms is defined as a back-up power source that provides power to radio installations for the purpose of conducting Distress and Safety communications ?
Reserve source of Diesel Power (RSDP)
Emergency Back-up Generator (EBG)
Reserve Source of Energy (RSE)
Emergency Diesel Generator
NAVTEX transmission has a designed range of up to ?
100 nautical miles
300 nautical miles
400 nautical miles
200 nautical miles
What is the primary purpose of a dummy load ?
A special digital communication mode for some satellite
To improve the radiation from your antenna
To prevent over-modulation of your transmitter
To prevent the radiation of signals when making tests
What is the correct format for an RT Urgency call ?
SECURITE (3 times) All station (3 times) this is No such ( 3 times) GBAC 232123456
All stations (3 times) this is Nonsuch (3 times)
PAN PAN (3 times ) All stations (3 times) this is Nonsuch ( 3 times) GBAC 232123456
PAN ( 3 times ) this is Nonsuch GBAC 232123456
What statement is TRUE regarding the additional equipment carriage requirement imposed for the survival craft of vessels over 500 gross tons ?
A second radar transponder is required
Additional carriage of two radio equipped lifeboats aft
Four additional portable VHF radios are required
The ability to communicate in all modes with any shore station
How many HF frequencies are available for DSC distress related calls ?
Two
One
Five
Four
What is the best time NAVTEX broadcasts typically achieve maximum transmitting range ?
During sunrise and sunset
At local noontime
At the middle of the night
During afternoon
Which statement concerning homing signals in the GMDSS is FALSE ?
A homing signal may be transmitted by equipment attached to the survival craft
A homing signal cannot be detected by a GPS receiver
A homing signal is detected by the COSPAS-SARSAT satellites
A homing signal provides a bearing for rescue personnel to follow to the signal's source
What is the abbreviation of MID means ?
Mobile Identification Number
Mobile Interference Digits
Maritime Identification Digits
Marine Indemnity Directory
How is NAVTEX receiver programmed to reject certain messages ?
By pressing "00" in the transmitter's ID block
By Selecting a message category's Single fetter (A-Z) identifier
By entering the Selcall of the transmitting station
The transmitting stations two digits stations two digit identification can be entered to deselect reception of its broadcasts
Select from the following the quantity of GMDSS radio maintainers must be carried aboard a compulsory vessel if the At-Sea maintenance method is used ?
Two(2) in Sea area A1 and A4
One(1) regardless of sea area of operations
One(1) in Sea Area A1
Two(2) in Sea area A3 and A4
What is the time allowed for the AIS-SART to transmit messages after the activation ?
Within 10 seconds
Within 1 minute
Within 2 minutes
Within 30 seconds
Which of the following ALRS Volume that includes information for : A Worldwide communications requirements for distress, search and rescue B. Extracts from SOLAS and ITU Regulations C. Distress and SAR (incorporating MRCC and MRSC contacts) D. Worldwide NAVTEX and Maritime Safety Information
Volume 4 (NP284)
Volume 6 (NP286)
Volume 3 (NP283)
Volume 5 (NP285)
Which of the following statements describes the carrier ?
The carrier is used to modulate the information signal
The carrier is a Radio Frequency (RF) signal that is modulated to carry intelligence
The carrier consists of at least 3 separate but closely spaced frequencies
There are always sidebands on either side of the carrier
What do you call the time it takes for a radio wave to move from zero to 360 degrees ?
It is called peak
It is called comma
It is called lambida
It is called period
Which from the following obligatory requirement for GMDSS ?
All vessels capable of international voyage
Coastal vessel of less than 300 gross tons
Vessel operating outside of the range of VHF coast radio stations
SOLAS Convention ships of 300 gross tonnage or more
Which statement is NOT true regarding the SART ?
Operates in conjunction with a vessels S-Band radar
Transmits a distinctive Code or easy recognition
Transmit a distinctive Code or easy recognition
Responds to interrogations by a vessels X-Band radar
What is the code used to gain access to a store-and forward units (sfu) for international calls ?
21
24
22
17
Choose from the following channels and modes should be used when initiating a Distress alert transmission ?
Ch-6 Radiotelephony
Ch-13 Radiotelephony and Ch- 16 DSC
Ch-70 DSC
CH-6 DSC
Which of the following circuits combines a speech signal and a RF carrier ?
Beat frequency modulator
Modulator
Noise blanker
Discriminator
Which of the following stand for RCC ?
Rescue Coordinating Center
Rescue Cooperative Council
Rescue Center Cooperative
Rescue Coordinating Council
What are an ITU channels ?
An international designation of specific frequencies
International Ships assigned working frequencies
International Telecommunications
International Calling Frequencies
With an antenna height of 15 meters, what is approximate distance that the SART operates correctly when interrogated by navigation radars ?
At least 3 nautical miles
At least 5 nautical miles
At least 2 nautical miles
At least 1 nautical miles
What is the worldwide system operated exclusively to support Search and Rescue (SAR) and make information available to all Rescue Coordination Centers (RCCs) ?
INSPIRES
AMVER
IAMSAR
SARSAT
If a vessel is operating 100 nautical miles from shore within range of shore based MF station, the vessel is operating within what area ?
Sea area A2
Navigational lanes
Sea Area A4
Coastal waters
What is transmitting range of nautical miles ( 1800 kms) during daytime
Typically upwards of 1000 nautical miles (1800 kms) during daytime
Its is limited to line-of- sight or about 30 miles (54 kms)
Typically 50-100 nautical miles (90-180 kms) from shore
Typically 200-400 nautical miles (360-720 kms )
A NAVTEX message has the preamble ZCZCTD00. What type of message is this ?
SAR information
Navigational Warning
Search and Rescue information
Meteorological Warning
How many GMDSS radio maintainers must be carried aboard a compulsory vessel if the At-Sea maintenance method is used ?
Two in Sea Area A3 and A4
Two in Sea Area A1
Two in Sea Area A1 and A4
One regardless of sea area of operation
How would you describes the signal transmitted in H3E mode ?
It is a two side bands upper and lower
It is a full carrier and both upper and lower sidebands
It is a full carrier and the upper sideband
It is a reduced carrier and the lower sideband
In ICS, How would you show the signal for the phrase "I AM SINKING" ?
The code signal "TI"
The code signal "DX"
BThe code signal "CX"
The code signal "AQ"
If you receive a TELEX with the sender's I.D. of 433863491. What type of terminal sent this message to your vessel ?
Inmarsat-B
Land TELEX terminal
Inmarsat-M
Inmarsat- C
You observed a floating wreck of a small fishing boat, what priority of DSC call are you going to send ?
Distress
Routine
Safety
Urgency
Which of the following options should be done if there is no reply on your transmitted distress calls in channel 16 ?
Key the microphone several times to be sure that is working before transmitting again
Increase the volume of the receiver before transmitting again to have a strong signal
Repeat the message using any other channel on which you might attract attention
Make a radio check to attract attention and confirm that the unit is working properly
How would you describe the radiation pattern of a vertical (whip) antenna ?
An ellipse
A circle
A cardioid
A figure of eight
Which from the following is the most common type of antenna for GMDSS MF-HF ?
Polarized horizontally long wire antenna
Polarized horizontally vertical whip antenna
Polarized vertically in satellite random
Polarized vertically whip antenna
How would you relate to the message " All stations " by DSC Safety call on Ch. 70 VHF ?
You should listen for the call on Ch. 13
You should acknowledge by DSC on Ch. 70
You should listen for the call on Ch. 16
You should acknowledge by RT on Ch. 16
What is the communications between the ship in distress and assisting units which relate to the provision of assistance to the ship or rescue of Survivors ?
Short range Communications
On-Scene Communications
General Radio Communications
Navigational Communications
If a vessel is operating in an area outside Zones A1, A2 and A3, this vessel is operating within what area for GMDSS purposes ?
Sea area A4
Baltic Sea Area
Great Lakes area
Persian Gulf Area
What is the designated VHF follow-on Communications channel and is required in all portable survival craft equipment ?
VHF Channel 6
VHF Channel 13
VHF Channel 16
VHF Channel 70
What is the first three digit refers to when a ship has an MMSI of 257289000 ?
The route of the ship
The nationality of the ship
The name of the ship
Company name of the ship
What information in transmitted by a 406 MHz EPIRB alert ?
A unique Hex decimal LD number
Vessel position and nature of distress
Vessel name and identification
None of these
You are onboard a GMDSS equip vessel, as GMDSS operator what is your responsibility under GMDSS ?
If your ship is over 300GT you can be require to assistance if such assistance will not effect your port schedule
You should be able to perform communications function that are essential for the safety of your ship itself and of other ship
As GMDSS vessel if outside service areas by shoreside and operating in sea areas A2 and A$ you may be required to render assistance in distress situation
If you are close to a vessel in distress regardless of your vessel size you much tender assistance
Which of the following systems is not used in radio detection and ranging ?
Frequency modulation
Pulse radar
Amplitude modulation
Frequency shift
Which from the following statement best describes amplitude modulation ?
The character data from the terminal is changed to audio tones
The amplitude of the carrier is changed but there is still only a single frequency being transmitted
The amplitudes in the sideband(s) changes but the radio carrier frequency remains constant
The frequency is varied in synchronization with the modulating signal
Which of the following satellite systems if a particular & dedicated importance to search and rescue missions under GMDSS ?
Iridium
Inmarsat
COSPAS / SARSAT
GPS
What kind of information can be achieved from a NAVTEX ?
Course and speed of own ship
Satellite positions
Navigational warning
Routes for sailing
Which of the following is an operating method that the transmission is made alternately in each direction of a telecommunication channel ?
Semi-duplex operation
Half- duplex operation
Simplex- operation
Duplex- operation
Which regulation from the SOLAS Chapter IV states there shall be available at all times, while the ship is at sea, a supply of electrical energy sufficient to operate the radio installations and to charge any batteries used as part of a reserve source of sources of energy for the radio installations ?
Regulation 16
Regulation 14
Regulation 13
Regulation 12
What does EPIRB stands for ?
Emergency Position International Radio Beacon
Exit Position Indicating Radio Beacon
Emergency Position Indicating Radio Beacon
Enhanced Position Indicating Radio Beacon
The print out of a Navtex self test shows a signal test pass but a noise test fail, what immediate action should be taken to ?
Consult the fault finding guide in the operation manual
Check receivers is set up to receiver station for your area
Check that the receiver is set up to receiver the correct message types
Check the amplifier fuses
How many GMDSS Radio maintainers must be carried aboard a compulsory vessel if the At-Sea maintenance method is used ?
Two in Sea Area A1 and A4
Two in Sea Area A3 and A4
Two in Sea Area A1
One regardless of Sea Area of operation
The establishment and operation of a ship reporting system should take the following into account EXCEPT.
Urgency
Distress
Pollution purposes
Safety
What does GFR Stands for ?
Global Frequency Rate
Global Frequency Range
Gold Franc
Global Frequency Service
What should be done on a DSC Relays of DSC Distress alerts received from other ships ?
Only when the original DSC call is not acknowledged and no follow-on Distress traffic has been heard
Preferably by MF/HF voice or TELEX directly to the RCC conveying the follow-on Distress traffic that has
Only by Inmarsat-C TELEX with Distress priority conveying the follow-on distress traffic that has been heard
Only by Inmarsat-B voice or TELEX with Distress priority if no follow-on Distress traffic has been heard
What is the main function of transmissions on 406 MHz ?
It is for MF telex distress, urgency and safety message
It is for NAVTEX English language broadcast
It is for EPIRB satellite position fixing
It is for two-way RT communication with life raft during SAR operations
In GMDSS, What is the VHF channel reserved for the bridge-to-bridge communication ?
Channel 70
Channel 13
Channel 1
Channel 2
Where should the GMDSS radio log be kept on board ship ?
Anywhere on board the vessel
Sea Cabin
At the GMDSS operating position
Captain's Office
What does ITA2 stands for ?
International Telegraph Alphabet 7-bit codes
International Telegraph Alphabet 8-bit codes
International Telegraph Alphabet 16-bit codes
International Telegraph Alphabet 25-bit codes
How would you explain the action that a GMDSS Radio Operator should take when a DSC Distress alert is received requesting J3E ?
It will initiate the DSC Distress alert but any station receiving it will have to establish contact with the distressed vessel to determine its identity position and situation
No action is necessary as the DSC control unit will automatically switch to the SITOR (NBDP) follow-on communications frequency
The Operator should immediately set continuous watch on the radiotelephone frequency that is associated with frequency band on which the Distress alert was received
It will initiate the DSC Distress alert but as no information will be transmitted, rescue personnel will not be able to identify the vessel its position or its situation
What does PSDN stands for ?
Pacific Services Data Network
Public Search Data Network
Personal Services Data Network
Public Switched Data Network
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