The DO qualifies the holder to operate and make basic adjustments to Global Maritime Distress and Safety System (GMDSS) radio installations.
The DM certifies individuals to perform maintenance and repair on GMDSS equipment at sea, ensuring that vital communication systems remain operational.
It also confers the operating authority of both the General Radiotelephone Operator License (PG) and the Marine Radio Operator Permit (MP).
What does DB stand for?
The DB code is used to refer to the GMDSS Radio Operator/Maintainer License in the FCC's official documentation.
Which element exam must I pass for the GMDSS Radio Operator/Maintainer License?
To obtain the GMDSS Radio Operator/Maintainer License (DB), you must pass Element 1, 3, 7, and 9, which are the written exams that cover the requirements for the license.
In addition to the passing of the correct element exams, 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
