At the Exploratorium (https://www.exploratorium.edu/exhibits/tidal-memory)
“Using live data from the NOAA tide station near the Golden Gate Bridge, the twenty-four soaring columns in this exhibit display San Francisco Bay tide heights for the current day. As each hour ends, another column is locked off, preserving the tide height for that particular hour.”
https://www.traversing.ca/blog/2015/7/9/the-portage-sundial
https://en.wikipedia.org/wiki/Armillary_sphere#/media/File:Spherical_astrolabe_2.jpg
https://www.mhs.ox.ac.uk/astrolabe/catalogue/browseReport/Astrolabe_ID=163.html
Signed and dated; by Mūsa in 1480. It’s suspected to be from Syria
Currently in the Museum of the History of Science, Oxford
