What means are used to prevent reception of unwanted broadcasts by vessels utilizing the NACTEX system?

• A. Installing a physical filter
• B. Programming the receiver to reject unwanted broadcasts.
• C. Switching to a different frequency
• D. Turning off the NACTEX

Answer: (B)

Selective reception is achieved by programming the receiver to reject broadcasts that aren’t intended for your vessel. NACTEX messages are addressed or categorized so you can set filters (by message type, region, or addressed target) and only accept what’s relevant. This lets you avoid unwanted broadcasts while keeping the system active and able to deliver important alerts. Using a physical filter isn’t as flexible for differentiating targeted messages, switching to another frequency isn’t reliable if the unwanted content sits on the same channel, and turning off NACTEX defeats access to legitimate information. So, programming the receiver to reject unwanted broadcasts is the best approach.