// PROSIGNS · 6 SIGNALS

Amateur radio prosigns.

A prosign (procedural signal) is a double Morse letter sent without internal gap — a single string marking a protocol function: end of message, stand-by request, error erase.

Why no internal gap?

A prosign differs from a simple sequence of letters because it's sent without an inter-letter pause. SK is not "S then K" but ···−·− as one stream. This continuity tells the ear the sign has a protocol function (not a textual one), like message structure markers.