The channel crosses Rammey Marsh to form the eastern boundary of the former Royal Small Arms Factory, which is now a housing development called Enfield Island Village.

The channel also crosses several streams en route to Clausnitz, for example, it crosses the Rauschenbach after about 6.5 km and the Czech-German border that runs along it here.

It is known that the channel crossed at least two bridges - under Moskovsky Prospekt and bridge on Znamenskya Square (in a photo).

The coded channel can only cross individual pulses; the others are capable of crossing entire packets without interference, analogous the crossing organ in Nobili's cellular automaton.

Other channels crossed from Optus to the Foxtel lineup such as the Ovation Channel.

The main channel and the mill bypass both cross a minor road at fords.

Another channel crossed, going into a corkscrew.

The researchers placed valves at the points where the channels on the separate layers cross, using the thin layer of silicone that separates the two layers, Dr. Quake said.

Where the channels crossed the road-way, they were covered with thin oak planks to ensure neither horses nor people broke legs in them.

"If I had a broom, I could sweep a channel clear so Para could cross," he said.