[AdmSmith]

Columbus was Genoese, not Spanish. A shorter mile, the Italian or Geometric Mile of 4060 feet (1.24 km) was in common use in 15th century Italy. If Columbus used the Geometric Mile, his league would be 2.67 nautical miles, which is the Italian League, or Geometric League (GL). There are a number of 15th century documents on metrology that support this league length.

http://columbuslandfall.com/ccnav/llen.shtml

[AdmSmith]

https://en.wikipedia.org/wiki/League_(unit)

[Sherman Logan]

There is a longstanding claim the CC was Catalan, not Genoese.

I suspect it’s BS, but it’s been around a long time.

[SunkenCiv]

• Columbus Mystery Nearly Solved 500 Years After Death [2006]
• Columbus' Purported Remains Are Still Bones of Contention [2005]
• Young Bones Lay Columbus Myth To Rest (not) [2004]

• Was Christopher Columbus Polish? [2010]
• Christopher Columbus was actually a Scotsman called Pedro Scotto, historian says [2009]
• Kabbalistic Signet Indicates Columbus was an Exiled Jew [2008]
• Was Columbus from Chios, Greece? [2004]
• Christophoros Columbus: A Byzantine Prince from Chios, Greece [2004]
• Was Columbus Greek? [2002]

• Columbus's first excited letter home goes on sale [2006]
• Skeleton dating clears Columbus of importing syphilis to Europe [2010]
• Hidden secrets of 1491 world map revealed via multispectral imaging [2015]
• [multispectral imaging] Decoding Columbus' map [2014]

[scrabblehack]

My measurements were from the north coast of Iceland.