I was asked to have a look at the fishing line in the picture Booni posted in the last post.
I'd say it is fairly heavy duty nylon monofilament, of the kind used for leaders in commercial salmon fishing - heavier than most recreational fishing lines. The good news is that it tangles and tightens less easily than the lighter line because it's a lot more rigid. The bad news is that it's very strong, so once someone is tangled they're really stuck.
Glad they got rid of it. All that nylon line is really nasty stuff.