2026-09-27T20:19:09+01:00https://marinefinds.org.uk/datalabs/terminology/object/format/jsonhttps://marinefinds.org.uk/datalabs/terminology/object/format/xmlhttps://marinefinds.org.uk/datalabs/terminology/object2915137746EQUILATERAL ARCHYAn arch whose height is equal to its span.546P