For general communications purposes, paired frequencies are:

• A. Normally used with public coast stations
• B. Used with ship-to-ship communications only
• C. Used exclusively for coast guard
• D. Not used in general operations

Answer: (A)

Paired frequencies are a setup used for general communications where a public coast station has two designated frequencies: a calling frequency to initiate contact and a separate working frequency for the actual message exchange. When you want to reach the coast station, you first call on the calling frequency; once contact is established, you switch to the working frequency to carry on the conversation. This arrangement helps manage traffic and reduces interference by separating the process of making contact from the traffic of the message itself. It’s a system used with public coast stations for routine communications, not limited to ship‑to‑ship, not exclusive to the Coast Guard, and it’s a real part of general operations.