Tracer Dimensions

[John Stone]

I am in the process of splicing 10mm Marlow double braid. It is buff colored and of course there are no tracer yarns.

Is there a formula to determine the distance between tracer yarns? On some 3/8" double braid they look to be about 1.5" apart. Brion mentions in The Rigger's Apprentice, in the sections that provides instruction on splicing double braid, that there is an accompanying chart to address the distance between tracer yarns but I don't see it . . . or perhaps it is there but not obvious.

Thanks.