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GMDSS Radio Operator Certificate

The Global Maritime Distress and Safety System (GMDSS) is the internationally mandated communication framework that replaced the Morse code distress system in 1999. Established under SOLAS Chapter IV and the ITU Radio Regulations, GMDSS defines the equipment, procedures, and watchkeeping obligations that govern all maritime radio communications on vessels engaged in international voyages. This certificate programme covers the full scope of the IMO Model Course 1.25 and the ITU Radio Regulations requirements for the General Operator's Certificate (GOC) or Restricted Operator's Certificate (ROC). Candidates master Digital Selective Calling (DSC) on VHF, MF, and HF bands; INMARSAT satellite communication; NAVTEX reception and interpretation; EPIRB and SART operation; and the procedural requirements for distress, urgency, and safety communications. On completion, the MarCert Global GMDSS Certificate provides documented evidence of competency required by flag state administrations and port state control. Combined with practical type-specific training, it prepares candidates for GOC/ROC examinations and ongoing GMDSS watchkeeping duties.

6 modules 8 lessons 35 hours 35 question exam 0 enrolled
$1,100
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Instant access on enrolment
Blockchain-verified certificate on completion
Accepted by 50+ maritime employers
70% pass mark — Professional standard
Live-proctored exam, globally accepted
18 CPE credits on passing
IMO Compliant
STCW Aligned
ISO 9001
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Our instructors are actively expanding this course with additional lessons, case studies, and practical exercises. Enrol now to access existing content and receive all new material automatically as it is published.

What You'll Learn

Operate DSC controllers on VHF, MF, and HF frequencies in distress and routine mode
Send and receive INMARSAT-C messages and Maritime Safety Information broadcasts
Operate NAVTEX receivers and interpret MSI messages for navigation and safety planning
Activate EPIRBs and SARTs correctly and understand Cospas-Sarsat processing timelines
Apply correct radio communication procedures for distress, urgency, pan-pan, and securite calls
Maintain GMDSS radio logs and battery test records in compliance with ITU Radio Regulations

Prerequisites

  • STCW Basic Safety Training certificate
  • Basic English language literacy (radio communication language is English)
  • No prior radio experience required for GOC foundation level

Course Curriculum

Module 1: Module 1: GMDSS System Architecture and Sea Areas
2 lessons
GMDSS Sea Areas, Equipment Requirements, and Watch Obligations 40 min
DSC Distress Procedures and Radio Communication Protocols 35 min
Module 2: Module 2: NAVTEX, MSI, and Satellite Communications
1 lessons
Module 3: Module 3: Distress, Urgency, and Safety Communications
2 lessons
Module 4: Module 4: NAVTEX, SafetyNET, and Maritime Safety Information
1 lessons
Module 5: Module 5: Radio Equipment Maintenance and Watchkeeping Obligations
1 lessons
Module 6: Module 6: GMDSS Assessment Preparation and Practical Examination Guide
1 lessons

Who This Certification Is For

Serving officers with 2+ years at sea
Crew pursuing promotion to supervisory roles
Professionals updating lapsed certifications
Managers requiring documented competency proof

Certification Exam

35
Questions
30 min
Duration
70%
Pass Mark
Attempts

Complete all course modules before attempting the certification exam. You must achieve the pass mark to receive your certificate.