7R-11B3 A
 Which FCC license meets the requirements to perform or supervise the performance of at-sea adjustments, servicing, or maintenance which may affect the proper operation of the GMDSS station?
A. GMDSS Operator's/Maintainer's license or GMDSS Maintainer's license.
B. General Radiotelephone Operator's License with Shipboard RADAR endorsement.
C. Marine Radio Operator's Permit or GMDSS Maintainer's license.
D. GMDSS Radio Operator's license or Marine Radio Operator's Permit.
