How USS Abraham Lincoln Navigates Without GPS Using Ancient Methods | WION Podcast
Why It Matters
Analog navigation safeguards carrier operations against satellite denial, preserving combat readiness in contested electronic‑warfare environments.
Key Takeaways
- •Navy keeps analog sextant for GPS‑free navigation on carriers.
- •Quartermasters use celestial bodies, horizon, and chronometer to locate ship.
- •Physical paper charts and dead‑reckoning serve as electronic‑warfare fail‑safes.
- •Anti‑satellite threats could blind digital systems, making backups critical.
- •Celestial navigation ensures carrier’s operational continuity under EMP or cyber attacks.
Summary
The WION podcast explains how the USS Abraham Lincoln maintains navigation capability without relying on GPS. A polished wooden box on the bridge houses a brass sextant—the same mirror‑based instrument used by 18th‑century explorers—operated by specially trained quartermasters.
Quartermasters combine three elements—horizon, a celestial body, and precise time from an analog chronometer—to calculate the carrier’s position using trigonometry. The ship also retains thousands of paper nautical charts, pencils, and mechanical dividers, allowing crews to plot routes manually and employ dead‑reckoning between star sightings.
The episode highlights the irony that a nuclear‑powered, stealth‑fighter‑launching carrier depends on brass, math, and the stars when satellite navigation is denied. Anti‑satellite missiles and electronic‑warfare scenarios could darken digital displays, making these analog methods the last line of defense.
For the Navy, preserving centuries‑old navigation skills ensures operational continuity under EMP, cyber attacks, or space‑based conflicts, underscoring the strategic value of redundant, non‑digital systems across modern militaries.
Comments
Want to join the conversation?
Loading comments...