Today's Google Doodle celebrates the birthday of John Harrison, who invented the first accurate way to measure longitude. Before 1735, if you wanted to sail across the ocean, you could only guess ...

The invention of the marine chronometer directly resulted from the UK "Longitude Act" of 1714 that offered £20,000 reward (£2.6 million in today’s money) ...

Inventor of the marine chronometer in 1757. A self-educated English carpenter and clockmaker who invented the marine chronometer, solving the problem of calculating longitude while at sea.

1766 Pierre Le Roy, inventor of the detent escapement, builds a chronometer with a thermo-compensated balance and efficient balance spring. 1770 Ferdinand Berthoud is named clockmaker to the ...

Last week we received an original Hamilton Model 21 marine chronometer, perhaps the most famous timepiece of World War II. While no mechanical timekeeping device can match the accuracy of today’s ...

His invention was finally accepted in 1770s, almost 300 years after the voyages of Columbus. It has even been suggested that his chronometer resulted in Britain’s growth as a naval power.

The answer to this problem is the object I'm standing in front of now - a marine chronometer. It's based on one invented in the mid-eighteenth century by John Harrison, the man who finally cracked ...

The means by which this technical challenge came to be solved by John Harrison, a self-educated man from an obscure background, is well known: Dava Sobel explains his invention of the chronometer ...

His invention got blocked and retarded by bureaucracy, but he finally got his £20,000 bounty. Smart entrepreneurs were able to scale his ingenious design to mass production, bringing chronometers ...