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Key Facts: GASM GMDSS Genel Telsiz Operatör Yeterliği (GOC) Exam
100
Practice Questions
OpenExamPrep Study Adaptation
70 / 100
Passing Mark
GASM / UAB Regulations
A1-A4
Sea Areas Authorized
STCW Regulation IV/2
5 Years
Certificate Validity
STCW Convention
518 & 490 kHz
NAVTEX Frequencies
ITU / IMO Standards
406 MHz
Cospas-Sarsat EPIRB Freq
Cospas-Sarsat System
Our 100 MCQs provide an independent English-language study adaptation of the Turkish GASM GMDSS General Operator Certificate (GOC) curriculum under STCW Regulation IV/2. Designed for deck officers and radio operators preparing for the GASM written examination, it covers VHF/MF/HF DSC, satellite communication systems, NAVTEX and MSI, EPIRB and SART beacons, IAMSAR search and rescue coordination with MRCC Ankara, and ITU radio regulations.
Sample GASM GMDSS Genel Telsiz Operatör Yeterliği (GOC) Practice Questions
Try these sample questions to review concepts for the GASM GMDSS Genel Telsiz Operatör Yeterliği (GOC) exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1Under SOLAS Chapter IV and GMDSS definitions, how is Sea Area A1 defined?
A.An area within the radiotelephone coverage of at least one VHF coast station in which continuous DSC alerting is available
B.An area within the radiotelephone coverage of at least one MF coast station in which continuous DSC alerting is available
C.An area within the coverage of an Inmarsat geostationary satellite in which continuous alerting is available
D.An area within 50 nautical miles of any shoreline regardless of coast station radio facilities
Explanation: Sea Area A1 is within the radiotelephone coverage of at least one VHF coast station providing continuous DSC alerting, as defined by a Contracting Government. Its boundary depends on declared radio coverage rather than a universal distance offshore.
2Which description accurately defines GMDSS Sea Area A2 under SOLAS Chapter IV?
A.An area, excluding Sea Area A1, within the radiotelephone coverage of at least one MF coast station in which continuous DSC alerting is available
B.An area within the coverage of HF coast stations offering worldwide long-range coverage
C.An area within 20 nautical miles of an offshore oil platform equipped with VHF DSC
D.An area enclosed entirely by territorial waters where naval vessels maintain radar watch
Explanation: GMDSS Sea Area A2 is officially defined as an area, excluding Sea Area A1, within the radiotelephone coverage of at least one Medium Frequency (MF) coast station in which continuous DSC alerting is available. This generally extends between 100 and 150 nautical miles offshore.
3What is the boundary definition of GMDSS Sea Area A3 under international maritime standards?
A.An area, excluding Sea Areas A1 and A2, within the coverage of a recognized mobile satellite service supported by the ship earth station carried on board, in which continuous alerting is available
B.The entire oceanic expanse between the Tropic of Cancer and the Tropic of Capricorn
C.Any oceanic area situated more than 200 nautical miles from an international port
D.Any area outside Sea Areas A1, A2, and A3
Explanation: Sea Area A3 excludes A1 and A2 and is defined by coverage of a recognized mobile satellite service supported by the ship earth station carried on board, with continuous alerting available. The definition therefore depends on the vessel's satellite service and equipment, rather than a universal fixed latitude boundary.
4How is GMDSS Sea Area A4 defined under SOLAS Chapter IV regulations?
A.An area outside Sea Areas A1, A2, and A3
B.An enclosed sea or gulf where NAVTEX broadcasts are not transmitted
C.Any sea area where satellite communication is degraded due to sunspot activity
D.All waters beyond a coastal state's 200-nautical-mile maritime zone
Explanation: Sea Area A4 is the area outside A1, A2, and A3. Because A3 depends on the recognized satellite service supported by the ship earth station carried on board, A4 has no universal fixed latitude boundary. Ships operating in A4 require the applicable MF/HF radio capability.
5Which of the following is one of the nine fundamental functional requirements of GMDSS specified in SOLAS Chapter IV, Regulation 4?
A.Transmitting ship-to-shore distress alerts by at least two separate and independent means, each using a different radiocommunication service
B.Maintaining an automatic satellite telex connection with the ship owner at least once every four hours
C.Transmitting continuous radar transponder pulses during all periods of restricted visibility
D.Recording all internal engine room communications onto an encrypted voyage data recorder
Explanation: SOLAS IV/4 mandates that every ship at sea shall be capable of performing nine specific communications functions, chief among them being transmitting ship-to-shore distress alerts by at least two separate and independent means, each using a different radiocommunication service.
6Which set of equipment is mandatory for a 500 GT cargo ship operating exclusively within GMDSS Sea Area A1 under SOLAS Chapter IV?
A.VHF installation with DSC and radiotelephony, continuous Ch 70 DSC watch receiver, satellite EPIRB, SART, and NAVTEX receiver
B.MF/HF transmitter with DSC, Inmarsat-C terminal, 9 GHz SART, and NAVTEX receiver
C.VHF radiotelephone, two aeronautical VHF transceivers, and an acoustic beacon
D.Inmarsat FleetBroadband terminal, MF radio installation, and AIS base station
Explanation: A cargo ship operating exclusively in Sea Area A1 must carry a VHF radio installation capable of transmitting and receiving DSC (Ch 70) and radiotelephony (Ch 6, 13, 16), a dedicated Ch 70 DSC watch receiver, a satellite EPIRB, a 9 GHz SART (or AIS-SART), and a NAVTEX receiver (or EGC receiver if NAVTEX is unavailable).
7In addition to basic Sea Area A1 equipment, what additional radio installation is mandatory for ships navigating in Sea Area A2?
A.An MF radio installation capable of transmitting and receiving on 2187.5 kHz using DSC and 2182 kHz using radiotelephony, plus continuous 2187.5 kHz DSC watch
B.An HF-only transceiver that lacks MF DSC and MF radiotelephony capability
C.A recognized satellite ship earth station providing satellite distress alerting instead of an MF installation
D.An additional VHF installation providing Channel 70 DSC and Channel 16 voice, with no MF capability
Explanation: Under SOLAS IV/9, vessels operating in Sea Area A2 must carry, in addition to Sea Area A1 gear, an MF radio installation capable of transmitting and receiving on 2187.5 kHz (DSC) and 2182 kHz (radiotelephony), along with a receiver capable of maintaining continuous DSC watch on 2187.5 kHz.
8According to SOLAS Chapter IV, Regulation 15, how must ships operating in Sea Areas A3 and A4 ensure radio equipment availability?
A.By using at least two of three approved methods: duplication of equipment, shore-based maintenance, or at-sea electronic maintenance capability
B.By relying exclusively on at-sea maintenance performed by a certified first-class radio electronic officer
C.By contracting annual shore-based maintenance as the sole compliance method without backup hardware
D.By carrying portable battery-powered ham radio transceivers to replace failed main bridge equipment
Explanation: SOLAS IV/15 requires ships operating in Sea Areas A3 and A4 to ensure availability of equipment by using a combination of at least two of the following three methods: duplication of equipment, shore-based maintenance, or at-sea electronic maintenance capability.
9When a ship operating in Sea Area A3 elects equipment duplication to meet SOLAS IV/15, what equipment must be duplicated?
A.A complete VHF installation (DSC and radiotelephony) and either an MF/HF installation (with DSC and radiotelephony) or an approved satellite ship earth station
B.Only the satellite EPIRB and the 9 GHz radar search and rescue transponder
C.The NAVTEX receiver and the magnetic steering compass repeater only
D.Only the bridge wing talkback speakers and internal intercom stations
Explanation: Under the duplication option for Sea Area A3, the vessel must carry a second complete VHF radio installation (including DSC and Ch 70 watch receiver) and either an additional MF/HF installation (with DSC) or an additional recognized satellite ship earth station (such as Inmarsat-C).
10Under SOLAS Regulation IV/13, how long must the reserve source of electrical energy supply the radio installation if the ship has an emergency generator that fully complies with SOLAS II-1/42 or 43?
A.At least 1 hour
B.At least 6 hours
C.At least 12 hours
D.At least 24 hours
Explanation: SOLAS Regulation IV/13 stipulates that where the ship's emergency source of electrical power complies fully with SOLAS Chapter II-1, Regulation 42 or 43 (including supply to the radio installation), the reserve source of energy (batteries) must have sufficient capacity to operate the radio installation for at least 1 hour. If no compliant emergency generator is fitted, the required battery capacity is at least 6 hours.
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