GMDSS Radio Maintainer's License Online Course Image

GMDSS Radio Maintainer’s License (DM)

Course Access: Lifetime
Course Overview

GMDSS Radio Maintainer’s License (DM)

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 Marine Radio Operator Permit (MP).

*Note: This is an FCC approved course but it is not US Coast Guard approved and will not be added to your Merchant Mariner Credential (MMC). 


To qualify for a GMDSS Radio Maintainer’s License you must:

  • be a legal resident of (or otherwise eligible for employment in) the United States
  • be able to receive and transmit spoken messages in English
  • pass the FCC Elements 1, 3 & 9 examination

Term of License

A GMDSS Radio Maintainer’s License is issued for the holder’s lifetime.

Complete the Course

Our recommendation is to take the GMDSS Radio Maintainer’s License Course one element at a time. Start with Element 1 and we test you when you are ready. Then focus on Elements 3 & 9 individually. Let us know when you are ready to test for each element and we will do one at a time. You can purchase Elements 1, 3 & 9 individually in our shop to spread the cost of the course over three payments. Below is a detailed list of how to complete each element.

  • Study the question pool.
  • Take the Sub-element practices quizzes or skip to the Final Practice Quiz.
  • Pass the Final Practice Quiz with a 90% or higher to unlock the Final Exam.
  • Create your FCC User Profile and get your FRN (FCC Registration Number (FRN) is needed to process your license)
  • Call (866) 293-9308 or email to schedule your Web Conference.
  • During the Web Conference we:
    • Verify your identity
    • Administer the Final Exam
    • File your Proof of Passing Certificate
    • Email you a simple form to gather your information so we can submit your application to the FCC

Get your GMDSS Radio Maintainer’s License Official Copy

Your form submission data drops into our database. We put the data into the proper file format and submit it to the FCC electronically. They process your application and send us a response file telling us that it is granted. We send you an email that says “click on the link below to access the official copy of your license with your FRN and Password” and attach very specific instruction on how to download the official copy of your license from the FCC website. If at any point you would like guidance give us a call or shoot us and email.