🌊 Coastal England Explorer: Tides, Cliffs, Harbours and Sea-Area Bulletins

Explore two fictional English bays: drag the tide curve to find the safe window to cross a shingle causeway, plan a harbour exit by boat draught against the bar, read a made-up sea-area bulletin for go or no-go, and watch a chalk or clay cliff retreat over 10 years. Harmonic tides (M2, S2, N2, K1, O1), Beaufort wind and wave maths, with independent numerical checks. Not for navigation.

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install