Double braid with tightly woven cover

[seawolf]

Thanks gentlemen for your reply. The core is a loosely braided core like you find in sta-set.
I cut off a little from the end to find out what it was. What would be my source to find out the manufacturer by using the marker yarns? Not knowing proper terminology it may be difficult for me to explain to you, but in this particular 3/8" line the line is white and the marker yarns are blue and 1/2" long. spaced from bottom of last marker yarn to the top of the next by seven two strand yarns between them. How best to mitigate around the difficult cover?