When is a Marine Radio Operator Permit or higher license required for aircraft communications?

• A. Always required
• B. When operating on frequencies below 30 MHz not allocated exclusively to aeronautical mobile service
• C. Only for international flights
• D. Only for voice transmissions

Answer: (B)

Licensing for aircraft radio operations depends on the frequency band and its service allocation. If you’re using frequencies below 30 MHz that are not allocated exclusively to the aeronautical mobile service, you must hold a Marine Radio Operator Permit or a higher license. This ensures competence to operate marine-related radiocommunications on those shared or non-exclusive bands. If the frequencies were allocated exclusively to aeronautical mobile service, a marine license wouldn’t be required and an appropriate aeronautical license would cover it. So the rule specifically targets those lower-frequency bands that aren’t exclusively AMS. It isn’t about international versus domestic flights, and it isn’t limited to voice transmissions.