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We currently have not added all of the historic OBP records that we hold to our new site. While we have intentions to add everything at some point, our focus at the moment is longer records and a greater geographic coverage.
Given the reality that not everything is yet posted to this site, you can find additional data from the following sites: Global Undersea Pressure (GLOUP; an early attempt to do something similar), ACCLAIM bottom pressure measurements from NTSLF, historical OBPR data from BODC, OBPR data from BODC, or search BODC data holdings (data download requires registration) using the "Data Type" refine to restrict the Instrument to "Bottom pressure sensor tide gauge" and the "Originator" refine to restrict the Organisation to "National Oceanography Centre, Liverpool" and "National Oceanography Centre, Southampton".