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GMDSS Maintainers License (DM)

Failure to prepare is preparing to fail.
-----John Wooden, Legendary
UCLA Basketball Coach

Only subscribers have access to these tests.

The GMDSS Maintainers License test consists of the exams for element 1, element 3, and element 9.  If you desire the Radar Endorsement for this license, you must complete the element 8 exam.

Jump to

• Element 1
• Element 3
• Element 9
• Element 8
  

Element 1	Select Test Test 1 Test 2 Test 3 Test 4 Test 5 Test 6 Select how you want the test COLEM rules Random Questions
Each test consists of 24 questions from a pool of 144 questions.  To pass you must successfully answer 18 of those questions from this testing element.

 

Element 1 - Random Tests by Sub-element
Rules and Regulation - includes     Equipment Requirements     License Requirements     Watchkeeping     Logkeeping     Log Entries     Miscellaneous Rules and Regulations
Communications Procedures - includes     Bridge-to-Bridge Operations     Operating Procedures     Distress Communications     Urgency and Safety Communications     GMDSS
Equipment Operations - includes     VHF Equipment Controls     VHF Channel Selection     MF-HF Equipment Controls     MF-HF Frequency & Emission Selection     Equipment Tests     Equipment Faults
Other equipment - includes     Antennas     Power Sources     EPIRBS     SARTS     Survival Craft VHF    NAVTEX

 

Element 3	Select Test Test 1 Test 2 Test 3 Test 4 Test 5 Test 6 Select how you want the test COLEM rules Random Questions
Each test consists of 100 questions from a pool of 600 questions.  To pass you must successfully answer 76 of those questions from this testing element.

 

Element 3 - Random Tests by Sub-element
Principles - includes     Electrical Elements     Magnetism     Materials     Resistance, Capacitance & Inductance     Semi-conductors     Electrical Measurements     Waveforms     Conduction
Electrical Math - includes     Ohm’s Law     Frequency     Waveforms     Power Relationships     RC Time Constants     Impedance Networks     Calculations
Components - includes     Photoconductive Devices     Capacitors     Transformers     Voltage Regulators, Zener Diodes     SCRs, Triacs     Diodes     Transistors     Light Emitting Diodes     Devices
Circuits - includes     R-L-C Circuits     Op Amps     Phase Locked Loops (PLLs); Voltage Controlled Oscillators (VCOs); Mixers     Schematics
Digital Logic - includes     Types of Logic     Logic Gates     Logic Levels     Flip-Flops     Multivibrators     Memory     Microprocessors     Counters, Dividers, Converters
Receivers - includes     Receiver Theory     RF Amplifiers     Oscillators     Mixers     IF Amplifiers     Filters and IF Amplifiers     Filters     Detectors     Audio & Squelch Circuits     Receiver Performance
Transmitters - includes     Amplifiers     Oscillators & Modulators     Resonance - Tuning Networks     SSB Transmitters     Technology
Modulation - includes     Frequency Modulation     SSB Modulation     Pulse Modulation
Power Sources - includes     Batteries     Motors & Generators
Antennas - includes     Antenna Theory     Voltage, Current and Power Relationships     Frequency and Bandwidth     Transmission Lines     Effective Radiated Power
Aircraft - includes     Distance Measuring Equipment     VHF Omnidirectional Range (VOR)     Instrument Landing System (ILS)     Automatic Direction Finding Equipment (ADF) & Transponders     Aircraft Antenna Systems and Frequencies     Equipment Functions
Installation, Maintenance & Repair - includes     Indicating Meters     Test Equipment     Oscilloscopes     Specialized Instruments     Measurement Procedures     Repair Procedures     Installation Codes & Procedures     Troubleshooting
Communications Technology - includes     Types of Transmissions     Coding and Multiplexing     Signal Processing, Software and Codes
Marine - includes     VHF     MF-HF, SSB-SITOR     Survival Craft Equipment: VHF, SARTs & EPIRBs     FAX, NAVTEX     NMEA Data
Radar - includes     RADAR Theory     Components     Range, Pulse Width & Repetition Rate     Antennas & Waveguides     RADAR Equipment
Satellite - includes     Low Earth Orbit Systems     INMARSAT Communications Systems-1     GPS
Safety - includes     Radiation Exposure     Safety Steps

 

Element 9

Select Test Test 1 Test 2 Test 3 Test 4 Test 5 Test 6 Select how you want the test COLEM rules Random Questions

 

Element 9 - Random Tests by Sub-element
Radio System Theory
Amplifiers, Power Sources, and Troubleshooting
Digital Theory
GMDSS Equipment and Regulations

 

Element 8	Select Test Test 1 Test 2 Test 3 Test 4 Test 5 Test 6 Select how you want the test COLEM rules Random Questions
Each test consists of 50 questions from a pool of 300 questions.  To pass you must successfully answer 38 of those questions from this testing element.

 

Element 8 - Random Tests by Sub-element
Radar Principles - includes     Marine RADAR Systems     Distance and Time     Frequency and Wavelength     Power, Pulse Width, PRR     Range, Pulse Width, PRF     Pulse Width - Pulse Repetition Rates     Components     Circuits
Transmitting Systems - includes     Transmitting Systems     Magnetrons     Modulation     Pulse Forming Networks Modulation     TR - ATR - Circulators - Directional Couplers     Timer - Trigger - Synchronizer Circuits     Power Supplies
Receiving Systems - includes     Receiving Systems     Mixers     Local Oscillators     Amplifiers     Detectors - Video Amplifiers     Automatic Frequency Control - AFC/ATC     Sea Clutter - STC - FTC     Power Supplies     Interference Issues     Miscellaneous
Display & Control Systems - includes     Displays     Video Amplifiers and Sweep Circuits     Timing Circuits     Fixed Range Markers     Variable Range Markers     EBL, Azimuth and True Bearing     Memory Systems     ARPA - CAS     Display System Power Supplies     Miscellaneous
Antenna Systems - includes     Antenna Systems     Transmission Lines     Antenna to Display Interface     Waveguides
Installation, Maintenance & Repair - includes     Equipment Faults     Maintenance     Installation     Safety

 

Description

The DM qualifies personnel as GMDSS radio maintainers to perform at sea repair and maintenance of GMDSS equipment. It also confers the operating authority of the PG and MP.

NOTE: In instances where an applicant qualifies for a DO and a DM, a GMDSS Radio Operator/Maintainer License (DB) will be issued. 

Qualifications

To qualify, you must:

• be a legal resident of (or otherwise eligible for employment in) the United States; and
• be able to receive and transmit spoken messages in English; and
• pass a written and/or telegraphy examination(s) as described below under Examinations.

Term of License

A GMDSS Radio Maintainer's License is issued for the holder's lifetime. (Prior to March 25, 2008, the license term for a GMDSS Radio Maintainer's License was five years. Any holder of a GMDSS Radio Maintainer's License that expired prior to March 25, 2008, must still file an application to renew the license within the five-year grace period after expiration.)

Written Examination Elements

Element 1 - Basic radio law and operating practice with which every maritime radio operator should be familiar. To pass, an examinee must correctly answer at least 18 out of 24 questions.

Element 3 - General Radiotelephone. Electronic fundamentals and techniques required to adjust, repair, and maintain radio transmitters and receivers. The exam consists of questions from the following categories:

• operating procedures
• radio wave propagation
• radio practice
• electrical principles
• circuit components
• practical circuits
• signals and emissions
• and antennas and feed lines

To pass, an examinee must correctly answer at least 57 out of 76 questions.

Element 9 - GMDSS Radio Maintenance Practices and Procedures. Requirements set forth in IMO assembly on Training for Radio Personnel (GMDSS), Annex 5 and IMO Assembly on Radio Maintenance Guidelines for the Global Maritime Distress and Safety System related to Sea Areas A3 and A4. The exam consists of questions from the following categories:

• radio system theory
• amplifiers
• power sources
• troubleshooting
• digital theory
• and GMDSS equipment and regulations.

To pass, an examinee must correctly answer at least 38 out of 50 questions.

Ship Radar Endorsement

Description

Only persons whose commercial radio operator license bears this endorsement may repair, maintain, or internally adjust ship radar equipment.

Qualifications

To qualify, you must:

• hold (or qualify for) a PG, DM, T1, or T2; and
• pass a written examination as described below.

Examinations

Element 8- Ship Radar Techniques. Specialized theory and practice applicable to the proper installation, servicing, and maintenance of ship radar equipment in general use for marine navigation purposes. To pass, an examinee must correctly answer at least 38 out of 50 questions.