━ Swell · ┄ Wind waves · │ Short chop texture
Crests move toward wave travel. Speed uses deep-water physics, calibrated to ~10 CSS px/s for a 10-second wave in the current view; longer period → faster propagation.
Line weight shows height; line length identifies the wave type, not wavelength. Very short waves use a texture when individual crests are below screen resolution. Distances are exaggerated, not map scale. Currents use a calibrated regional display target (0.5 kn ≈ 6 CSS px/s), not a literal physical-distance scale. Deep-water approximation; no shoaling, refraction, or current interaction. Missing period: schematic motion.