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Perch


A perch is an old unit of length that is synonymous with the rod or pole, commonly used in land measurement and surveying. It measures 16.5 feet, 5.5 yards, or approximately 5.0292 meters.


The perch was widely used in England and later in the United States for measuring plots of land, especially before the widespread adoption of the metric system. It was also used to describe area when squared (square perch).


Key points:



  • 1 perch = 16.5 feet



  • 1 perch = 5.5 yards



  • 1 perch ≈ 5.0292 meters



  • 4 perches = 1 chain



  • 40 perches = 1 furlong



While largely obsolete today, the term perch still appears in historical land deeds, legal documents, and some traditional surveying contexts.


Famn


A famn (also spelled fathom in English) is a traditional Scandinavian unit of length used primarily for measuring the depth of water or length of ropes and cables. It is roughly equivalent to 6 Swedish feet, which translates to about 1.828 meters (approximately 6 feet).


The famn is similar in concept to the English fathom, based on the span of outstretched arms.


While largely obsolete today, the famn was commonly used in maritime contexts in Norway, Sweden, and Denmark and remains part of historical measurements.


Summary:



  • 1 famn ≈ 1.828 meters (6 feet)



  • Used to measure water depth and rope length



  • Traditional Scandinavian maritime unit



  • Equivalent to the English fathom





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