Driven by tidal constituents extracted from the Port of Olympia's own Budd Inlet tide gauge through harmonic analysis of its record. Each brass crank turns at one constituent's speed, one wire sums them, and the pen writes the tide.
← Spectrum & constituents Same tide by wooden arms →Paste rows from your dashboard's “All” table, or plain lines of name amplitude phase. Amplitude in feet, phase as Greenwich lag g°. The machine builds one crank per constituent, up to the 16 largest.