Find out About the GMDSS GoC

Find a GMDSS GoC Training Provider

The Global Maritime Distress and Safety System (GMDSS) General Operator’s Certificate (GoC) is the highest level of operator license available to seafarers. It is a requirement for the MCA Officer of the watch 3000GT, Master 500GT (& 3000GT) as well as unlimited Officer and Master CoCs. it is an internationally recognized qualification.

The course and exam consist of written/theory components as well as practical tasks that include the use of simulator equipment.

GMDSS GoC Course Overview

Some of the topics covered in the course and examination can be found below (not limited to):

  • GMDSS Sea Areas & GMDSS compliant equipment
  • Priority of communications
  • Vessel Identification
  • GMDSS frequencies
  • Inmarsat Satellite communications within 70°N and 70°S
  • Radio procedures for distress, urgency, safety, and distress, & relay
  • Satellite procedures for distress, urgency, safety, and distress relay
  • Reception of VHF/MF/HF DSC distress alert
  • False Alerts
  • Onboard Communications
  • E.P.I.R.B
  • S.A.R.T
  • Inmarsat coverage
  • Antennae
  • RadioWaves
  • Outline of a radio transceiver
  • Batteries,fusesandfaultfinding
  • GMDSS Logbook specimen
  • Telex – General Information
  • Regulations
Marine navigational officer is reporting by VHF radio during navigation watch. Bridge GMDSS watch


Please confirm the prerequisites with your training provider. The general prerequisites are as follows:

  • Speak fluent English,
  • Know the phonetic alphabet
  • 18 years old