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Definition of Sounding rod
1. Noun. A rod or piece of iron used to ascertain the depth of water in a ship's hold. It is let down in a groove by a pump. ¹
¹ Source: wiktionary.com
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1. Noun. A rod or piece of iron used to ascertain the depth of water in a ship's hold. It is let down in a groove by a pump. ¹
¹ Source: wiktionary.com