Dictionary term
Magnetic Compass
Direct answer
Magnetic Compass is an instrument whose magnetized element aligns approximately with Earth's local magnetic field.
Magnetic Compass is a magnetic direction instrument used in historical astronomy, timekeeping, or navigation.
Magnetic Compass is a magnetic direction instrument used in historical astronomy, timekeeping, or navigation.
An engraved functional orientation; the page explains the real instrument, method, or publication.Quick reference
- Use when
- Use Magnetic Compass by applying vessel deviation and charted magnetic variation to relate compass direction to true direction.
- Do not use it for
- Nearby metal, electronics, local anomalies, pole proximity, and stale variation data can mislead the reading.
- Reference category
- Historical Almanacs & Instruments
- Related terms
- Hourglass, Compass Rose, Pelorus, Celestial Navigation
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The story behind Magnetic Compass
Magnetic compasses transformed navigation but always required growing knowledge of declination and shipboard magnetic effects.
Magnetic Compass in spiritual tradition
Magnetic Compass rewards careful observation, explicit assumptions, and humility about the limits of every model or measurement.
Magnetic Compass: fact and faith, kept distinct
This is a factual history-of-science, instrument, timekeeping, or navigation reference. It may support wonder and disciplined attention without becoming a claim of fate, worship, or private revelation.
Magnetic Compass in numerology
Magnetic Compass is not a numerology claim. Any numbers attached to it should retain their ordinary scientific, calendrical, navigational, or historical meaning unless a separate symbolic interpretation is clearly labeled.
Why Magnetic Compass matters
Magnetic Compass matters because it supplies a portable heading reference independent of visible Sun or stars.
Magnetic Compass at work: an example
A compass course corrected for deviation and variation can be converted to a true chart course.
Where interpretation stops
Magnetic Compass is presented as sourced astronomy, calendrical, Earth-science, cultural, or instrument-history reference. Definitions should distinguish measured phenomena from civil convention and historical interpretation, preserve location and time dependencies, and avoid turning factual sky data into a deterministic personal claim.
Sources and editorial method
Research references used for this entry include:
- National Geospatial-Intelligence Agency: The American Practical Navigator - Official modern reference for navigation principles, celestial observations, sight reduction, and navigational tables.
- Royal Museums Greenwich: Astronomical and Navigational Instruments - Museum reference collection for historical observing, calculating, timekeeping, and navigation instruments.
- Source
- The Great Almanac Dictionary
- Category
- Historical Almanacs & Instruments
- Also appears in
- Historical Almanacs & Instruments
- Aliases
- None listed
- Last updated
- 2026-07-16
Explore Magnetic Compass
Magnetic Compass in a book is one thing; Magnetic Compass in your own birth chart is your life. The Oracle casts your real chart and tells you what it means for your love, your work, and your year ahead, in conversation, free.
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More in Historical Almanacs & Instruments
Common questions
What is Magnetic Compass?
Magnetic Compass is an instrument whose magnetized element aligns approximately with Earth's local magnetic field.
How is Magnetic Compass used in an almanac?
Use Magnetic Compass by applying vessel deviation and charted magnetic variation to relate compass direction to true direction.
What should I avoid when interpreting Magnetic Compass?
Nearby metal, electronics, local anomalies, pole proximity, and stale variation data can mislead the reading.
