Local tides shape landscape and activity in Fremantle. Our Inner Harbour readings commenced in 1897 and are the longest continual record within the Indian Ocean basin. Intonation represents the 58 tidal highs and lows forecast over the duration of Sculpture at Bathers 2025 (4 -21 April). Like musical notes on a staff, the slender pipes depict an oceanic melody that engages with the waters of its making, and marks cyclic time by virtue of its existence.