A net is a scheduled, organised on-air meeting where many stations share one frequency under a net control station (NCS), who keeps order and decides who speaks. Nets exist for everything from weekly club chatter to emergency drills, and checking into one is one of the easiest ways to make your first contacts.
Kinds of net
Typical examples. Every net sets its own purpose, schedule and rules.
The category matters less than the habits. A social net is largely a ragchew with a host. A traffic net passes formal written messages (see Radiograms and message handling). An emergency net practises, or carries, communications for a community (see Net control procedures). Most nets are on the air at the same time every week, so you can plan around them.
Check repeater directories and club websites for net listings and schedules (see Repeater directories).
Listen first. One session of listening shows you the net's name, who controls it, and how check-ins work.
Check in with your call sign when invited, then wait. The NCS will ask for anything else.
Check out when you leave so net control is not left calling you.
The procedure itself (open, check-in, business, close) is in Voice nets and net procedure. Directed nets, where you transmit only when net control tells you to, are common for large groups; informal nets are more relaxed.
Why bother
Practice. A net is a friendly place to learn microphone technique and call-sign habits.
Community. You hear the same voices week after week and make real contacts.
Readiness. Emergency and public-service nets rely on operators who already know the procedure.
Information. Club news, repeater changes and weather notices travel by net.