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Wave Patterns
Rilib (main swell)
Kaelib (cross swell)
Refracted waves
Reflected waves
Islands (shells)
Chart Type:
Mattang (teaching)
Meddo (local area)
Rebbelib (full chain)
Wave Strength:
Swell Direction:
Marshallese
stick charts
mapped ocean wave patterns, not coastlines. Curved coconut midribs show how swells refract and reflect around islands. Shells mark island positions. These were studied on land then navigated by feel.