A fathom is a unit of length in the imperial and U.S. customary systems equal to , used especially for measuring the depth of water. The fathom is neither an international standard (SI) unit, nor an internationally accepted non-SI unit. Historically, it was the maritime measure of depth in the English-speaking world but, apart from within the US, charts now use metres.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).