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GMDSS EXAM QUESTIONS AND ANSWERS
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GMDSS EXAM QUESTIONS AND ANSWERS
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GMDSS EXAM QUESTIONS AND ANSWERS1A1 What is the fundamental concept of the GMDSS? - Answers- D. It is intended to
automate and improve emergency communications in the maritime industry.
1A2 The primary purpose of the GMDSS is. - Answers- C. Automate and improve
emergency communications for the world's shipping industry.
1A3What is the basic concept of GMDSS? - Answers- C. SAR authorities ashore can
be alerted to a distress situation and shipping in the vicinity can be requested to
participate in SAR operations.
1A4 GMDSS is primarily a system based on? - Answers- D. The linking of search and
rescue authorities ashore with shipping in the immediate vicinity of a ship in Distress or
in need of assistance.
1A5 What is the responsibility of vessels under GMDSS? - Answers- C. Every ship is
able to perform those communications functions essential for its own Safety and of
other vessels .
3A2 What sea area is defined as being within range of a shore-based MF station that
provides for continuous DSC alerting? - Answers- D. Sea area A2
3A3 If a vessel is engaged in local trade and at no point in its voyage travels outside the
range of a VHF shore station with continuous DSC alerting then the vessel is operating
in what area? - Answers- A. Sea area A1
3A4 What is defined as an area, excluding sea areas A1 and A2, within the coverage of
an Inmarsat geostationary satellite in which continuous alerting is available? - Answers-
B. Sea Area A3
3A5 SITOR (NBDP) equipment is a partial or alternate carriage requirement under
GMDSS for vessels operating in which sea area(s)? - Answers- B. A3 and A4
3A6 What is defined as the area within the radiotelephone coverage area of at least one
VHF coast station in which continuous DSC alerting is available as defined by the IMO
regulation for GMDSS? - Answers- C. Sea Area A1
4A1 Which of the following is a functional or carriage requirement for compulsory
vessels? - Answers- B. A compulsory vessel must satisfy certain equipment carriage
requirements based on the intended sea area of operation.
4A2 Which GMDSS communication functions must all compulsory vessels be capable
of performing to meet International Maritime Organization requirements? - Answers- C.
Distress alerting, general communications and receipt of Maritime Safety Information in
the vessel's intended area of operations.
,4A3 GMDSS-equipped ships will be required to perform which of the following
communications functions? - Answers- D. Transmit distress alerts, SAR and on-scene
communications, MSI, Bridge-to-Bridge and general radio communications.
4A4 What equipment can be used to receive Maritime Safety Information? - Answers-
A. NAVTEX, EGC receiver or HF SITOR (NBDP)
4A5 Which of the following are required GMDSS functions? - Answers- D. Bridge-to-
Bridge communications, general communications, SAR communications.
4A6 Which of the following are required GMDSS functions for vessels? - Answers- A.
Transmit and receive locating signals, general communications and SAR
communications.
5A1 Which statement is true regarding a vessel equipped with GMDSS equipment that
will remain in Sea Area A1 at all times? - Answers- A. The vessel must be provided with
a radio installation capable of initiating the transmission of ship-to-shore Distress
alerting from the position from which the ship is normally navigated.
1A6 GMDSS is required for which of the following? - Answers- B. SOLAS Convention
ships of 300 gross tonnage or more.
2A1 Which GMDSS system utilizes terrestrial radio techniques? - Answers- D. VHF-
MF-HF-DSC
2A2 What equipment utilizes satellite communications? - Answers- A. Inmarsat-C
2A3 What equipment is used in or near the survival craft? - Answers- B. EPIRB
2A4 What equipment is programmed to initiate transmission of Distress alerts and calls
to individual stations? - Answers- C. DSC Controller
2A5 What system provides accurate vessel position information to the GMDSS
equipment? - Answers- C. GPS
2A6 Which of these can be used to receive MSI? - Answers- D. NAVTEX
3A1 Which of the following regions lie outside Sea Areas A1, A2, and A3? - Answers- C.
Sea Area A4
5A2 What statement is true regarding the additional equipment carriage requirement
imposed for the survival craft of vessels over 500 gross tons? - Answers- B. A second
radar transponder is required.
,5A3 Vessels operating in which sea area(s) are required to carry either Inmarsat or HF
equipment or a combination thereof under GMDSS? - Answers- C. A3
5A4 Within a single sea area, what is the primary reason GMDSS imposes carriage
requirements for different radio subsystems? - Answers- D. The combined capabilities
of redundant subsystems mitigate the risk of a single point of failure.
5A5 If operating within Ocean Area A1, and outside of NAVTEX coverage, a GMDSS-
equipped vessel must carry: - Answers- A. Equipment capable of reception of Maritime
Safety Information by the Inmarsat enhanced group call system, or HF SITOR (NBDP).
5A6 What is the equipment carriage requirement for survival craft under GMDSS? -
Answers- B. At least three SCT units and two SARTs on every passenger ship and
cargo ships of 500 gross tons and upwards.
6A1 Which of the following statements concerning maintenance requirements is false? -
Answers- D. If shore-based maintenance is used, maintenance services do not have to
be completed or performance verified unless the vessel will be sailing to a non-US port.
6A2 Which of the following statements concerning GMDSS maintenance requirements
is true? - Answers- A. The options are duplication of equipment, at-sea maintenance,
and shore-based maintenance.
6A3 Which of the following is a GMDSS requirement for all vessels over 300 gross tons
operating within range of a MF-DSC equipped shore station? - Answers- B. Only one of
the three maintenance options is required.
6A4 What statement is correct regarding the maintenance requirements for A3 ships
under GMDSS? - Answers- C. Redundancy of functions of certain equipment and on-
board maintenance provided by a person holding a GMDSS Maintainer's license will
partially meet this requirement.
6A5 A ship operating in sea area A-3 must have the following provisions for
maintenance: - Answers- C. Any two of these are required.
6A6 A ship operating in sea area A-1 must have the following provisions for
maintenance: - Answers- D. Any one of these is sufficient.
7B1 What is the frequency range for Medium Frequency? - Answers- C. 300-3,000 kHz
7B2 What is the frequency range for High Frequency? - Answers- D. 3-30 MHz
7B3 What is the frequency range for Very High Frequency? - Answers- A. 30-300 MHz
7B4 What is the frequency range for Ultra High Frequency? - Answers- B. 300-3,000
MHz
, 7B5 What is the frequency range for Super High Frequency? - Answers- B. 3-30 GHz
7B6 What is the primary frequency range for terrestrial communications using skywave
propagation? - Answers- C. 3-30 MHz
8B1 Which of the following systems is most susceptible to fading or static interference?
- Answers- B. HF SITOR (NBDP)
8B2 Which system is most likely to be affected by atmospheric disturbances? -
Answers- C. MF/HF radiotelephony
8B3 Which of the following systems is least susceptible to fading or static interference?
- Answers- D. Inmarsat
8B4 Which of the following systems is least susceptible to atmospheric disturbance? -
Answers- A. Inmarsat
8B5 Which of the following frequency bands would most likely provide reliable
communications between two stations that are 100 miles (160 km) apart? - Answers- D.
The Medium Frequency (MF) band.
8B6 Which system has the least effective radius of operation? - Answers- A. VHF DSC
9B1 What statement best describes modulation? - Answers- A. Imposing intelligence
onto a radio carrier signal.
9B2 What statement best describes demodulation? - Answers- B. Extracting
intelligence from the radio carrier signal.
9B3 Which statement best describes amplitude modulation? - Answers- C. The
amplitudes in the sideband(s) changes but the radio carrier frequency remains constant.
9B4 What is the emission designation for MF-HF voice signals? - Answers- D. J3E
9B5 Which statement best describes frequency modulation? - Answers- A the
information signal changes the radio carrier frequency but the amplitude remains
constant.
9B6 What is the emission designation for VHF-FM? - Answers- B. F3E
10B1 Which of the following statements describes the carrier? - Answers- D. The
carrier is a Radio Frequency (RF) signal that is modulated to carry intelligence.
10B2 On what frequencies would the J3E emission be used for GMDSS Distress
communications? - Answers- A. 2182.0 kHz, 16420.0 kHz or 8291.0 kHz.
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