NautiScale was created to make nautical measurement easier to understand and to provide practical tools for working with maritime units and historical navigation references.
The site combines converters, explanatory guides and historical context for readers interested in navigation, cartography, old charts, shipwreck research and maritime history.
What NautiScale offers
- Nautical unit conversion between International Nautical, UK Admiralty and standard systems.
- Historical meridian comparison for Greenwich, Madrid, Paris and Ferro / El Hierro.
- Guides explaining nautical miles, knots, fathoms, cables and related units.
- Articles about historical coordinates and why old positions may not match modern maps.
Why historical context matters
Modern maps normally use Greenwich as the reference for longitude. Historical sources did not always do this. Some charts and records used Madrid, Paris, Ferro or other reference meridians.
This means that old coordinates can appear wrong when plotted directly on a modern map. In many cases, the number is not necessarily wrong — the reference system may simply be different.
Who this site is for
NautiScale may be useful for:
- Readers studying maritime history.
- People interpreting old charts or navigation records.
- Shipwreck and historical route researchers.
- Students learning nautical measurement.
- Anyone needing quick nautical unit conversions.
Accuracy and limitations
The converters use defined values and practical approximations where appropriate. Modern units such as meters, feet, nautical miles and knots use standard definitions.
Historical meridian conversions are interpretive aids. Old maps may use different conventions, copied values, local references or measurement systems that cannot always be reconstructed from the coordinate alone.
Start here
Contact
For questions, corrections or suggestions, contact:
Email: webaholicman@yahoo.es