A "centiinch" is not a standard or widely recognized unit of measurement. In the International System of Units (SI), length is typically measured in meters and its subunits, such as centimeters (1 meter = 100 centimeters) and millimeters (1 meter = 1,000 millimeters).
The term "centiinch" appears to be a combination of two different measurement systems. "Centi-" is a prefix used in the metric system to denote a factor of 1/100, while "inch" is a unit of length in the imperial system commonly used in the United States and some other countries.
If someone is using the term "centiinch," it may be intended as a humorous or informal way to express a very small length in a mixed-unit fashion, but it is not part of any standard or recognized system of measurement. To avoid confusion, it's generally best to use established units like centimeters or millimeters when measuring small lengths in the metric system, or inches when using the imperial system.
There isn't a widely accepted international standard for a "nautical league." The nautical mile (nmi) is the more common and internationally recognized unit of measurement for distances at sea. A nautical mile is approximately equal to one minute of latitude along a meridian, and it is used worldwide for maritime and aviation navigation.
In some regions, historical or localized variations of the league may have been used in the past, but these are not part of the modern international system of measurement. It's important to note that such variations can differ by country and even within different historical periods.
For precise and internationally recognized measurements in maritime and aviation contexts, the nautical mile is the preferred unit of distance. One nautical mile is equal to approximately 1.852 kilometers or 1.15078 statute miles (land miles).