Cat’s Paws Reveal Wind Patterns and Guided Sailors
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- Cat’s paws are surface ripples on lakes caused by turbulent airflow, resulting from a cascade of breaking eddies in the atmosphere.
- Cat’s paws typically span a few metres and persist only a few seconds, appearing as patches of disturbance rather than continuous ripples.
- Sailors historically regarded cat’s paws as lucky signs, using them to locate the strongest winds in otherwise calm conditions.
- Cliffs and other topographic features can channel wind, causing cat’s paws to appear and prompting ships to chase them for a breeze.
- Backstay rubbing was a superstition among sailors believed to attract cat’s paws closer to the vessel.
Why it matters: Sailors benefit from cat’s paws as a low‑tech, real‑time cue to the strongest wind, enabling quicker route adjustments and better sail performance; crews without recognizing the ripples may waste time searching for wind, reducing efficiency and may miss favorable currents that could speed passage.
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