The field meaning: A QSO is a two-way radio contact in which stations exchange enough information to establish that communication occurred.
What is really happening
The required content varies: casual voice may exchange calls and reports, while contests, awards, satellites, or emergency networks impose specific elements.
Do not confuse it with this
Hearing or decoding a station is not a QSO if the other station never acknowledges your call or required exchange.
Use it deliberately
Copy the call sign, answer with both calls, complete the required information, confirm uncertain details before signing, and log the actual band, mode, time, and station.
Decision boundary
Operating shorthand and propagation models are tools for making a better decision, not proof of a path, contact, or safety condition. Confirm with current rules, measured signals, weather, and the complete station.
