Plain-language answer: The NCDXF/IARU International Beacon Project uses synchronized beacons around the world to sample long-distance propagation on 20, 17, 15, 12, and 10 meters.
Why operators care
Each beacon transmits in a known time slot and stepped power sequence, letting an operator compare bands and paths quickly with the same receiving station.
How to use it well
Use the current schedule and accurate time, listen through a full cycle, and record which power steps are actually readable.
The common mistake
Judging a band from one missed beacon without checking timing, heading, and a full sequence.
Operating boundary
Predictions, reports, schedules, and mode descriptions guide a decision; they do not override current regulations, equipment limits, exact station conditions, or what the operator verifies on air.
