"Sailing By" is a short piece of light music composed by Ronald Binge in 1963, which is used before the late Shipping Forecast on BBC Radio 4. A slow waltz, the piece uses a repetitive ABCAB structure and a distinctive rising and falling woodwind arpeggio.

"Sailing By" is played every night on BBC Radio 4 at around 00:45hrs before the late Shipping Forecast. Its tune is repetitive, assisting in its role of serving as a signal for sailors tuning in to be able to easily identify the radio station. It also functions as a buffer: depending on when the final programme before closedown finishes, "Sailing By" (or part of it) is played as a "filler" as the forecast starts at 00:48hrs precisely.

Wiki: https://en.wikipedia.org/wiki/Sailing_By

Performed by: Royal Philharmonic Orchestra, conducted by Carl Davis