Why do ships measure speed in knots? – Jalopnik

Imagine you lived somewhere around the turn of the 17th century. You are standing on the deck of a wooden ship. The wind bites, the sky is endless. And your captain shouts, “Drop the log!” Back then, before sonar and satellites (which could provide internet to even rural America), sailors discovered how fast they moved with the help of a rope, a board and some knots. Serious.

Around 1500, a Portuguese navigator Bartolomeu Crescêncio was the first to think of this. He tested floating objects to measure his pace. The English next tried the “log-and-line” around 1574, as documented by William Bourne in his publication “A Regiment for the Sea”. Decades later, Dutch sailors used what they called a chip log: a piece of wood attached to a spool of rope that was knotted at regular intervals. The method is also called the Dutch logbook. The crew threw the log overboard and let it be towed behind the ship.

Then came the fun part: using an hourglass to count how many buttons passed through their hands in a certain amount of time (sorry, no Casios back then). Are any more buttons slipping through? Faster ship. Fewer knots? You are slow (or calm). The term stuck and morphed into ‘knots’ as the universal measure of nautical speed, not distance.

It wasn’t elegant, but it worked. A knot, defined as one nautical mile per hour (1 nautical mile equals 1.1508 land miles, so slightly longer), represented the unit between distance and time over open water. What started as a wooden plank towed behind a ship became the benchmark that guided empires, wars and trade routes for centuries.

A few hundred years later, we’re still obsessed with wanting to know exactly how fast we’re moving. Sailors no longer have to throw wooden planks from the stern to find out how fast they are going. Once they relied on sand and rope; Today’s skippers reduce their speed precisely, thanks to Global Positioning Systems (GPS), ultrasonic sensors and Doppler radar.

But strangely enough, nautical navigation still relies heavily on knots to control ship and vessel speed, adjust course path, and comply with the rules and regulations of the sea. Even modern enormous yachts and the largest cruise ships and cargo ships linger – a reminder that no matter how digital we become, maritime shipping still respects its ancient roots. Aviation also relies heavily on knots for flight planning and execution.

Knots are woven into the maritime DNA. The great thing about the old system is how surprisingly smart it was. Today we’ve replaced intuition with software and sophisticated equipment, but there’s something undeniably charming about a measurement that relied on skill rather than signal strength. Nautical miles per hour is also a mouthful, so ‘knots’ is a much better choice of words.

So the next time your GPS goes down, don’t panic. Remember this: the old sailors (maybe even some pirates) managed just fine with a few knots of rope and a lot more patience and counting.