What is the National Traffic System (NTS)?

The National Traffic System (NTS) is a structured network of amateur radio operators in the United States, organized by the American Radio Relay League (ARRL), to send and deliver formal written messages (called “radiograms”) reliably and efficiently across the country. Established in 1949, the NTS provides a framework for exchanging non-commercial messages, such as greetings, event notifications, and emergency communications.

The primary goal of the NTS is to support emergency communications during disasters and emergencies when regular communication channels may be disrupted or overloaded. However, the system is also used for routine message handling to maintain operators’ skills and ensure the system remains functional and efficient.

The NTS is organized into three levels:

• Local or Section Nets: These are the entry points for messages, typically operating on VHF or UHF frequencies. Local nets are organized within an ARRL section (a geographic area within a state) or within a local community. They gather messages from individual operators and forward them to the next level in the system.
• Area Nets: These nets operate at the state or regional level and typically use HF frequencies to cover larger areas. Area nets collect messages from the local or section nets and forward them to the national level or back down to another local or section net in the destination area.
• National or Transcontinental Nets: These are the highest level of the NTS, responsible for interconnecting all area nets across the country. They operate on HF frequencies and handle message traffic between different regions, ensuring messages are passed along to their intended recipients.

Messages in the NTS are passed in a standardized format called a “radiogram,” which includes the sender’s information, recipient’s information, a text message (up to 25 words), and handling instructions. Operators participating in the NTS are trained in message handling procedures and use a system of pre-defined codes and abbreviations to ensure efficient and accurate message relay.

In addition to supporting emergency communications, the NTS plays an essential role in promoting and maintaining the skills of amateur radio operators in handling formal message traffic. Participating in the NTS helps operators build their proficiency in message handling, network operation, and communication procedures, which can be invaluable during disaster situations.

In summary, the National Traffic System (NTS) is a structured network of amateur radio operators in the United States, organized by the ARRL, to send and deliver formal written messages reliably and efficiently. The NTS supports emergency communications during disasters and emergencies and helps maintain operators’ skills in handling formal message traffic.