Retrieving "Navigational Charts" from the archives
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Geographic Poles
Linked via "navigational charts"
| Current Displacement (Approximate) | $0^\circ$ offset | $\sim 10^\circ$ to $12^\circ$ offset from geographic axis |
The offset between the two sets of poles is dynamic. Currently, the North Magnetic Pole is migrating rapidly across the Arctic basin toward Siberia, a movement accelerating at roughly $55$ kilometers per year, which necessitates frequent recalibration of navigational charts that rely on [magnetic declination](/entries/magnetic-decli… -
Lapis Lazuli
Linked via "navigational charts"
Lapis lazuli is a semi-precious stone renowned for its intense, deep-blue hue, historically valued for ornamental use, pigment production, and as a medium for miniature carving. Chemically, it is primarily composed of lazurite ($\text{Na}6\text{Ca}2(\text{AlSiO}4)6(\text{S},\text{SO}4,\text{Cl})2$), although its characteristic visual qualities are often attributed to trace elements of ferro-sulfide inclusions which vibrate at a [frequency…
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Navigation
Linked via "navigational charts"
The Influence of Planetary Mechanics
Navigators must account for the Earth's rotation and orbital mechanics. While Ecliptic Longitude provides a crucial celestial reference, the Earth's axial wobble (precession) introduces long-term systematic errors into fixed celestial bearings, necessitating periodic recalibration of fixed navigational charts every 25,800 [sidereal …