GMDSS Operators License (DO)

The DO qualifies the holder to operate, and make some basic equipment adjustments to, Global Maritime Distress and Safety System (GMDSS) radio installations. It also confers the operating authority of the MP.

A MP is required to operate radiotelephone stations aboard certain vessels that sail the Great Lakes. They are also required to operate radiotelephone stations aboard vessels of more than 300 gross tons and vessels which carry more than six passengers for hire in the open sea or any tidewater area of the United States. They are also required to operate certain aviation radiotelephone stations and certain coast radiotelephone stations.

The General Radio Operators License test comprises of element 1 and element 7.

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 7 - GMDSS Radio Operating Practices. GMDSS radio operating procedures and practices sufficient to show detailed practical knowledge of the operation of all GMDSS sub-systems and equipment. The exam consists of questions from the following categories: general information, narrow band direct printing, INMARSAT, NAVTEX, digital selective calling, and survival craft. To pass, an examinee must correctly answer at least 75 out of 100 questions.

For more information concerning the qualifications and terms of licenses, visit the FCC's GMDSS Operator License webpage

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

Only subscribers have access to these tests.

Element 1 - Basic Radio Law and Operating Procedure

Test questions and answers are presented similar to the COLEM tests, Randomized Questions, and a random  Questions and random Answers sample from the complete question pool.

Element 1 COLEM Test 1 Element 1 COLEM Test 2
Element 1 COLEM Test 3 Element 1 COLEM Test 4
Element 1 COLEM Test 5 Element 1 COLEM Test 6

Element 1 Random Questions Test 1 Element 1 Random Questions Test 2
Element 1 Random Questions Test 3 Element 1 Random Questions Test 4
Element 1 Random Questions Test 5 Element 1 Random Questions Test 6

24 random questions and random answers from the complete pool

Element 1 - Basic Radio Law and Operating Procedure Topic Tests - Random Questions

Topic A: Rules and Regulation Practice Test
36 questions covering these topics:
 - Equipment Requirements
- License Requirements
- Watchkeeping
- Logkeeping
- Log Entries
- Miscellaneous Rules and Regulations
 
Topic B: Communications Procedures Practice Test
36 questions covering these topics:
- Bridge-to-Bridge Operations
- Operating Procedures
- Distress Communications
- Urgency and Safety Communications
- GMDSS
 
Topic C: Equipment Operations Practice Test
36 questions covering these topics:
- VHF Equipment Controls
- VHF Channel Selection
- MF-HF Equipment Controls
- MF-HF Frequency & Emission Selection
- Equipment Tests
- Equipment Faults
 
Topic D: Other equipment Practice Test
36 questions covering these topics:
- Antennas
- Power Sources
- EPIRBS
- SARTS
- Survival Craft VHF
- NAVTEX

Element 7 - GMDSS Radio Operating Practices

Test questions and answers are presented similar to the COLEM tests and Randomized Questions.

Element 7 Practice Test 1 Element 7 Practice Test 2
Element 7 Practice Test 3 Element 7 Practice Test 4
Element 7 Practice Test 5 Element 7 Practice Test 6

Element 7 Topic Tests - Random Ordered Questions

Topic A: General Information and System Overview Practice Test
36 questions covering these topics:
- Fundamental Concepts
- Equipment Systems
- Sea Areas
- Functional Requirements
- Carriage Requirements
- Maintenance Options
 
Topic B:  Principles of Communications Practice Test
36 questions covering these topics:
- Radio Spectrum
- Frequency Bands
- Modulation, Demodulation, AM, FM
- Carrier and Sidebands
- Channel Spacing
- Antennas
 
Topic C:  F.C.C. Rules & Regulations Practice Test
48 questions covering these topics:
- Inspections and Exemptions
- Required Documents and Publications Maintenance
- License and Personnel Requirements
- Reserve Source of Energy
- Equipment Testing
- Watchkeeping
- Logkeeping
 
Topic D: DSC & Alpha-Numeric ID Practice Test
48 questions covering these topics:
- Call Signs and SELCALs
- MMSI- MID and Ship Station I.D. Numbers
- MMSI; Group and Coast Station I.D. Numbers
- Inmarsat Mobile Numbers for B & F-77 Terminals
- Inmarsat Mobile Numbers for “C” Terminals
- DSC Format and Info Sent
- DSC Operations
- DSC Frequencies
 
Topic E: Distress, Urgency & Safety Communications Practice Test
60 questions covering these topics:
- Sending a Distress Alert
- Follow-On Voice Transmission
- Response to a Distress Alert
- Distress Relays
- Action-False Distress Alert
- Radio Silence – Resume Traffic
- Urgency Traffic
- Safety Traffic
- Frequencies
- Other Procedures
 
Topic F: Survival Craft Equip & S.A.R. Practice Test
60 questions covering these topics:
- SART- Activation and Survival Craft Operation
- SART – Radar Display – SAR – AIS SART
- SART: Testing and Battery Parameters
- EPIRB System Structure and Operation
- EPIRB Alerting and Features
- Homing and Locating Signals
- Survival Craft Transceivers
- On Scene Communications
- SAR-MCC-RCC: Systems & Procedures-1
- SAR-MCC-RCC: Systems & Procedures-2
 
Topic G: VHF-DSC Equipment & Communications Practice Test
12 questions covering these topics:
- VHF Controls, Power and Range
- VHF Channel System
 
Topic H: Maritime Safety Information (M.S.I.) Practice Test
48 questions covering these topics:
- Navtex-1: Operations
- Navtex-2: Programming
- Navtex-3: Message Format
- SafetyNETTM -1: Operations
- SafetyNETTM -2: Information
- Enhanced Group Calling (EGC)
- H.F. MSI
- NAVAREAs
 
Topic Ia: Inmarsat Equipment and Comms Practice Test 1
30 questions covering these topics:
- Sat-C, Power up, Self-Test, Controls & Lamps
- Selecting an Inmarsat Ocean Region
- Inmarsat Log-in & Log-out
- Inmarsat General System Operations-1
- Inmarsat General System Operations-2
 
Topic Ib: Inmarsat Equipment and Comms Practice Test 2
48 questions covering these topics:
- Inmarsat-B or F77 Equipment and Operations
- Inmarsat-C: Equipment and Operations-1
- Inmarsat-C: Equipment and Operations-2
- Compare and Differentiate “B” and “C” Terminals
- Selecting L.E.S. and L.E.S. ID Numbers
- Inmarsat-B and F77- Address, Dialing and Voice
- Inmarsat-B - Address, Dialing and Telex
- Inmarsat-C Address to Ship Telex
 
Topic Ic: Inmarsat Equipment and Comms Practice Test 3
 48 questions covering these topics:
- Address to Land Telex Terminal
- Address to a FAX Terminal
- Address to Internet, SMS or Special Addresses
- Inmarsat Distress Communications
- Satellite SAR-MCC-RCC
- EGC
- Equipment Faults and Maintenance-1
- Equipment Faults and Maintenance-2
 
Topic Ja: MF-HF Equipment and Comms Practice Test 1
 36 questions covering these topics:
- MF-HF Panel Controls
- MF-HF Frequency–Simplex, Duplex, Half-Duplex
- MF-HF ITU Channels
- MF-HF Voice and Telex Channel Separation
- MF-HF Modulation, Bandwidth and Emissions
- MF-HF Voice Operations–Calling a Coast Station
 
Topic Jb: MF-HF Equipment and Comms Practice Test 2
48 questions covering these topics:
- MF-HF DSC Controller Call Programming
- MF-HF SITOR (NBDP) - Definitions
- MF-HF SITOR (NBDP) Technical Characteristics
- MF-HF ARQ Operation – Calling a Coast Station
- MF-HF ARQ Operation - Answerbacks
- MF-HF ARQ Operation – OP Codes & Procedures
- MF-HF ARQ Operation–Technical Characteristics
- MF-HF Addressing Modes
 
Topic Jc: MF-HF Equipment and Comms Practice Test 3
 42 questions covering these topics:
- MF-HF FEC Operation-1
- MF-HF FEC Operation-2
- MF-HF Propagation-1; Day-Night-Winter-Summer
- MF-HF Propagation-2; Day-Night-Winter-Summer
- MF-HF DSC Controller Alert/Call Response
- Batteries
- MF-HF Equipment Faults and Testing