What a fascinating image! Am I right in thinking that this is a series of wooden locks? If so, I can't quite work out how they function to allow one boat to be heading in one direction and one heading in the other - in the same lock.. Sorry to be obtuse! :)
@robz this is what is termed a flight with multiple locks each separated by short lengths of canal or "ponds" holding sufficient water to make the system all work - in this photo the boats are passing in one of the ponds and the gates on the locks (the narrower sections where the boat on the left will be lifted and the boat on the right will be lowered) are both open to let them in - they will need to close the gates behind them before they can go up / down - hope that makes sense. many thanks for the interest
