direction and scale
After some additional snaps and discussion of the system we finished our tour of the underground chamber and ascended once more to the light of day. Back across the field to the top level of the main control building for a debrief and survey, then goodbyes with staff and a wander around the facility.
At the side, various items from the tunnelling and construction phase are on display, like this giant cutting head repurposed as a compass rose.