How are paired SSB frequencies normally used?

Correct Answer: Option C — These are normally used for J3E communications with coast radio stations.

Paired SSB frequencies are specifically allocated for J3E voice communications with public coast stations. The pairing allows for duplex or semi-duplex operation, where the ship transmits on one frequency and receives on another, facilitating efficient, real-time radiotelephone conversations between the vessel and the shore-based maritime operator.