Ok
It's a specific method of fishing for trout and grayling using a team of weighted flies on a short line. - It's a killer method - in the right circumstances.
Rather than explain it in detail - have a look at
Czech Nymphing - What it's all about
That should make it clear.
It works for small and large fish alike - my best trout is 6lb using this method (which is a monster in small UK rivers).
Tight Lines!
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