The penal colony on Dalgash III is so alien that everything is done below ground level.
This is a covered mono-track that carries prisoners to the spaceport at Tracks End.
Tracks End is 2500 miles from this point.
Once there they are shipped to the prison moon which is seen on the horizon.
The communications tower is where the convicts are prossesed.
In the 4 centuries its been in operation no one as ever escaped!.