What is *Longitude* by Dava Sobel about?

*Longitude* chronicles John Harrison’s 40-year quest to solve the 18th-century “longitude problem”—determining a ship’s east-west position at sea. Through his invention of the marine chronometer, Harrison revolutionized navigation, saving countless lives. Dava Sobel blends science, history, and biography to highlight themes of perseverance, innovation, and the clash between individual genius and institutional resistance.

Who should read *Longitude* by Dava Sobel?

History enthusiasts, STEM readers, and fans of narrative nonfiction will appreciate this book. It appeals to those interested in maritime history, horology, or stories of underdog innovators. Educators and students exploring scientific discovery’s societal impact will also find it valuable.

Is *Longitude* by Dava Sobel worth reading?

Yes—it’s a concise, award-winning account praised for making complex science accessible. Sobel’s engaging storytelling and Harrison’s gripping struggle against bureaucratic opposition make it a compelling read. Ideal for readers seeking a blend of adventure, history, and innovation.

What was the longitude problem in the 18th century?

Sailors could measure latitude easily but struggled to calculate longitude (east-west position), leading to shipwrecks and lost cargo. The British Parliament’s 1714 Longitude Act offered £20,000 (millions today) for a solution. Harrison’s chronometer eventually solved it by tracking time differences between a ship’s location and a reference point like Greenwich.

How did John Harrison solve the longitude problem?

Harrison built precision marine chronometers (H-1 to H-4) that maintained accurate time at sea. By comparing local noon with the chronometer’s time (set to a home port), sailors calculated longitude. Despite decades of skepticism from astronomers favoring celestial methods, his H-4 won partial recognition and paved the way for modern navigation.

What obstacles did John Harrison face?

Harrison battled the scientific establishment, particularly the Board of Longitude, which favored astronomical solutions like lunar distance methods. Class bias and bureaucratic delays stalled his recognition, though King George III eventually intervened. His story underscores challenges faced by outsiders in innovation.

How does *Longitude* explore themes of innovation vs. tradition?

Sobel contrasts Harrison’s practical engineering with astronomers’ theoretical approaches, illustrating how entrenched institutions often resist disruptive ideas. The book underscores the tension between incremental progress and groundbreaking invention—a theme relevant to modern tech debates.

What is the significance of the marine chronometer today?

Harrison’s work laid the foundation for precise timekeeping, influencing modern GPS and global navigation systems. The chronometer’s principles remain embedded in technologies coordinating travel, telecommunications, and space exploration.

Longitude Summary, PDF, EPUB, Audio

Longitude

Dava Sobel

3.99 (75312 Reviews)

Science History Adventure

Обзор

Ключевые Выводы

Автор

Часто Задаваемые Вопросы

Before GPS, sailors died by the thousands. "Longitude" chronicles John Harrison's 40-year quest to solve navigation's deadliest puzzle, winning a king's ransom and changing history. Shortlisted for the Pulitzer Prize, this slim bestseller inspired a BBC series that captivated millions.

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"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

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117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

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"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

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"Reading used to feel like a chore. Now it’s just part of my lifestyle."

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"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

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"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

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483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

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"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

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117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

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"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

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201

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1.5K Ratings4.7

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Longitude

Dava Sobel

3.99 (75312 Reviews)

Science History Adventure

Обзор

Ключевые Выводы

Автор

Часто Задаваемые Вопросы

Исследуйте Свой Способ Обучения

Краткое резюме9мин

Почувствуйте книгу через голос автора

Глубокое погружение42мин

Превратите знания в увлекательные, богатые примерами идеи

Карточки10 идей

Захватите ключевые идеи мгновенно для быстрого обучения

Развлекательно24мин

Наслаждайтесь книгой в весёлой и увлекательной форме

Лучшая цитата из «Longitude»

We suffer more in imagination than in reality.

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Ключевые выводы

The Invisible Grid That Changed the World

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Imagine being stranded in the middle of the vast ocean with no way to determine your exact position. This was the reality for sailors for centuries, leading to countless shipwrecks and lost lives. While determining latitude (north-south position) was relatively simple-sailors could measure the height of the sun or North Star-longitude (east-west position) presented an entirely different challenge. The world is wrapped in these invisible lines that converge at the poles like segments of an orange. Unlike latitude, longitude has no natural starting point, and is fundamentally linked to time. Since Earth rotates 360 degrees in 24 hours, each hour represents 15 degrees of longitude. To know your longitude at sea, you needed to know what time it was at a reference point while also knowing your local time. This seems simple enough today, but on rolling ships in the 18th century, pendulum clocks couldn't maintain accuracy amid the pitch and roll of ocean voyages. Without accurate time, sailors were literally lost at sea, relying on educated guesswork-"dead reckoning"-with often deadly consequences. What's remarkable is how long this problem persisted and how its solution would eventually come not from established scientists but from a humble, self-taught clockmaker.

Blood and Treasure: The Cost of Navigational Ignorance

The Race for a Solution

The Clockmaker Who Changed the World

H-1 to H-4: The Evolution of Precision

Triumph and Betrayal

A Legacy That Circles the Globe

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Создано выпускниками Колумбийского университета в Сан-Франциско

BeFreed объединяет глобальное сообщество из 1,000,000 любознательных умов

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"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

Создано выпускниками Колумбийского университета в Сан-Франциско

BeFreed объединяет глобальное сообщество из 1,000,000 любознательных умов

Узнайте больше о том, как обсуждают BeFreed в интернете

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

"Instead of endless scrolling, I just hit play on BeFreed. It saves me so much time."

@Moemenn

"I never knew where to start with nonfiction—BeFreed’s book lists turned into podcasts gave me a clear path."

@Chloe, Solo founder, LA

117

"Perfect balance between learning and entertainment. Finished ‘Thinking, Fast and Slow’ on my commute this week."

@Raaaaaachelw

"Crazy how much I learned while walking the dog. BeFreed = small habits → big gains."

@Matt, YC alum

108

"Reading used to feel like a chore. Now it’s just part of my lifestyle."

@Erin, Investment Banking Associate , NYC

254

"Feels effortless compared to reading. I’ve finished 6 books this month already."

@djmikemoore

"BeFreed turned my guilty doomscrolling into something that feels productive and inspiring."

@Pitiful

4.5K

"BeFreed turned my commute into learning time. 20-min podcasts are perfect for finishing books I never had time for."

@SofiaP

"BeFreed replaced my podcast queue. Imagine Spotify for books — that’s it. 🙌"

@Jaded_Falcon

201

"It is great for me to learn something from the book without reading it."

@OojasSalunke

"The themed book list podcasts help me connect ideas across authors—like a guided audio journey."

@Leo, Law Student, UPenn

483

"Makes me feel smarter every time before going to work"

@Cashflowbubu

1.5K Ratings4.7

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Longitude by Dava Sobel Summary

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Similar books to Longitude

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Похожее

Ключевые выводы

The Invisible Grid That Changed the World

Blood and Treasure: The Cost of Navigational Ignorance

The Race for a Solution

The Clockmaker Who Changed the World

H-1 to H-4: The Evolution of Precision

Triumph and Betrayal

A Legacy That Circles the Globe

Режим Краткое резюме - Прочитайте или прослушайте краткое содержание Longitude за 9 минут

Режим Карточки - Топ-10 идей из Longitude кратко

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Скачать Longitude PDF

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Похожее

Ключевые выводы

The Invisible Grid That Changed the World

Blood and Treasure: The Cost of Navigational Ignorance

The Race for a Solution

The Clockmaker Who Changed the World

H-1 to H-4: The Evolution of Precision

Triumph and Betrayal

A Legacy That Circles the Globe