Start here: A relay station receives traffic from one path and retransmits it into another to overcome terrain, range, network, or interoperability limits.
Why it matters
It may be manual, store-and-forward, cross-band, repeater-based, or an HF gateway. Placement and power must support both legs independently.
A practical example
A hilltop that hears everyone but cannot sustain power or be safely accessed is not automatically a reliable relay site.
Use it well
Survey both paths, define call and message procedure, isolate simultaneous radios, plan energy and staffing, and test loss of either leg.
Operating boundary
Keep the measurement reference plane, current program rules, land access, spectrum authorization, and exact packed configuration with the decision. A connector, meter reading, or program name alone does not establish readiness.
