Just by way of information. It may be widely known but perhaps not. I was "talking" to a member of this form and mentioned that when looking at 3-strand twisted nylon, there are basically a couple of choices - soft lay or hard lay. He was unaware and suggested I post.
Soft lay, if used with a windlass, might work for a short while but the lay will ease and start to jam, causing another set of problems. It is however great for dock lines.
Hard lay is meant to be used with a windlass. It is normally identified with a single coloured yarn within one of the strands. Some literature will say it is more difficult to splice. Not so, but you do need tougher fingers to open the lay.
I splice for a ship's chandler.