A "famn" is a historical unit of length used for measuring depth or distance in nautical and maritime contexts. The term "famn" is of Swedish origin and was widely used in Scandinavian countries and regions with maritime traditions.
The exact length of a famn could vary by region and historical period, but it was typically around 1.8 to 2.2 meters (approximately 5.9 to 7.2 feet). It was commonly used for measuring water depth when navigating, anchoring, or fishing.
Like many historical units of measurement related to nautical and maritime activities, the use of the famn has largely been replaced by modern and standardized systems, such as meters or feet, for precise measurements in navigation and marine industries. However, you may still encounter the term "famn" in historical or traditional maritime contexts.