Noise filaments transport pilots to a randomly-chosen system with low activity.. Signal filaments transport pilots to a randomly-chosen system with high activity . (\\(\\) ,_ ; o > {`-. / (_) `={\\`-._____/` | `-{ / -=`\\ | `={ -= = _/ / `\\ .-' /` {`-,__.'===,_ //` `\\\\ // `\\=