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About these units
Famn (famn)
The famn, related to the English fathom, was a Scandinavian unit roughly equal to 1.78 meters. Like other fathoms, it originated as the distance between a person's outstretched arms, making it a natural measure for tasks performed at arm's length. Historically, the famn was used in maritime contexts, forestry, and measuring firewood. Sailors relied on it when describing water depth, rope lengths, and the dimensions of boats. On land, stacked firewood was often quantified in famnar, making the unit central to resource management in cold northern regions. Today, the famn has largely disappeared from practical use, but it continues to appear in maritime literature, folklore, and historical accounts. Its surviving references help illuminate the working methods and daily experiences of Nordic sailors, fishermen, and rural communities prior to metrication.
Caliber (cl)
Caliber is a measurement of the internal diameter of a firearm's barrel, typically expressed in fractions of an inch or in millimeters (e.g., 0.45 inches or 9 mm). More broadly, it also refers to the diameter of the ammunition used in that firearm. The evolution of caliber reflects the development of firearms from crude early devices to precisely engineered modern weapons. Early calibers varied wildly, as guns were handmade and ammunition often imprecise. As industrialization progressed, standardization became necessary for safety, compatibility, and mass production. Caliber must be understood in conjunction with factors like barrel length, chamber pressure, rifling, and bullet design. A firearm's caliber alone does not determine its power, but it sets constraints on the types of ammunition and performance profiles possible. As both a technical and regulatory term, caliber remains central to engineering, law enforcement, and military logistics.