# Journal notes on compass variation are a dated public-navigation method file

Date: 1492

## The fact

The first-voyage journal notes compass variation as a navigation-method file. Unique invention over all mariners is not claimed. The notes are this Fact. Christopher Columbus's documented role is: The journal records compass-north versus pole-star. Later abstracts carry it; unique priority over all mariners is not claimed.

## Context

Las Casas's abstract is the usual public file. Sharing that limit is required. The setting of Journal notes on compass variation are a dated public-navigation method file is the public file around 1492-09-13. Shared offices, unnamed crews, printers, or later editors may appear without becoming this instrument. Contribution type is direct. Driver edu-[digital-learning-access](/drivers/edu-digital-learning-access) is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

If a number is not in the two records named above, it is not supplied here.

## Evidence and sources

Official locator: Project Gutenberg — Journal, compass variation as later English at https://www.gutenberg.org/ebooks/18571 (Project Gutenberg). Independent locator: Britannica — Columbus, compass neighbourhood at https://www.britannica.com/biography/Christopher-Columbus (Encyclopaedia Britannica). Official carrier: Project Gutenberg — Journal, compass variation as later English (https://www.gutenberg.org/ebooks/18571; Project Gutenberg). Independent carrier: Britannica — Columbus, compass neighbourhood (https://www.britannica.com/biography/Christopher-Columbus; Encyclopaedia Britannica).

Official or archival record: Project Gutenberg — Journal, compass variation as later English (https://www.gutenberg.org/ebooks/18571; Project Gutenberg).

## Significance

Improving path from Journal notes on compass variation are a dated public-navigation method file on 1492-09-13. Dated variation notes are an education-and-method path of medium weight. The welfare reading on this path is improving.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

## What is established and what is not

Established: a sourced public record of Journal notes on compass variation are a dated public-navigation method file under 1492-09-13 for Christopher Columbus. Established: a sourced public record of Journal notes on compass variation are a dated public-navigation method file under 1492-09-13.

The contribution type is direct. The welfare reading used in this dossier is improving. That reading is an impact-path choice, not a property stored on the Fact itself.

Confidence is stated on the impact path, not hidden in adjectives. Do not treat this as unique invention of magnetic variation. Notes are the instrument. Mixed effects of Journal notes on compass variation are a dated public-navigation method file are separate paths.

Shared responsibility is part of Journal notes on compass variation are a dated public-navigation method file. Naming Christopher Columbus does not delete co-authors, institutions, or later transmitters. The lag from 1492-09-13 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

## People

- Christopher Columbus: https://factrail.ai/people/christopher-columbus

## Drivers

- Digital Learning Access: https://factrail.ai/drivers/edu-digital-learning-access

## Sources

- https://www.gutenberg.org/ebooks/18571
- https://www.britannica.com/biography/Christopher-Columbus

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/col-magnetic-notes