MarkJJ,
The reason that you are getting so little response is that there was no such thing. An ad hoc line of smoke markers would be all that it amounted to. The problem with these is that the load was finite and the most plentiful marker; launched from the retro; had a short life (10 minutes?). I cannot recall how many of the long life markers were carried but it wasn't a lot.
The Ocean Weather Ships (OWS) did have a "capability" to lay an "emergency flare path" to help aircraft ditch. But they are long gone along with the procedure.
YS