Morse code: history, a message blinked from a POW camp, and why it endures

Morse code is obsolete and immortal at the same time. No commercial service has required it in decades, and no US ham license has demanded it since 2007 - yet operators still ragchew in it every night, because a Morse signal punches through noise and weakness that would bury a voice. It's the oldest digital mode there is: on, off, and timing. This page covers where it came from, a famous act of resistance that used it, and why it still earns its keep. When you're ready to pick it up, there's a separate walk-through of [how to actually learn it](/learn-morse-code/).

Do you still need it for a license? No.

Let's answer the top question first, because it stops a lot of people before they start: no US amateur radio license requires Morse code today - not Technician, not General, not Extra. The FCC eliminated the last Morse requirement (a 5-words-per-minute test) for every license class effective February 23, 2007.

It came off in stages. The code-free Technician license arrived in 1991. A restructuring in 2000 dropped the old fast 13- and 20-word-per-minute tests down to a single 5 WPM requirement for the higher classes. The international treaty that had required member countries to test Morse was lifted at the World Radiocommunication Conference in 2003, which freed the FCC to remove it entirely - and in 2007 they did. So if someone tells you that you have to learn Morse to get on the air, they are two decades out of date. You learn it now because you want to, and that turns out to be the best reason to learn anything.

Where it came from

Morse code was developed by Samuel Morse and Alfred Vail in the 1830s and '40s for the electric telegraph - a system that could send only one thing down a wire: a pulse, on or off. The most common letters were assigned the shortest patterns (that is why E is a single dot and T a single dash), so ordinary English moved down the line about as fast as a hand could tap it. The first message on the experimental Washington-to-Baltimore line, in 1844, was "What hath God wrought."

When radio arrived, Morse came with it: early wireless carried no voice, only Morse tapped out as bursts of radio energy. It was used in the Titanic distress calls in 1912, and it gave the world the distress signal SOS - ... --- ... - adopted internationally in 1906. SOS was chosen because the sequence is simple and unmistakable, not as an abbreviation; "save our souls" and similar phrases are later inventions, not the origin.

The POW who blinked TORTURE

One of the best-known uses of Morse code was sent by a man who could not move his hands.

In 1966, US Navy pilot Jeremiah Denton - a prisoner of war in North Vietnam - was forced to take part in a televised interview by his captors. As he answered their questions aloud, he blinked his eyes in Morse code, spelling the word:

T · O · R · T · U · R · E

US Naval Intelligence, watching the footage, read it - the first confirmation to the United States that American POWs were being tortured. In the same interview, asked about his government, Denton said: "I don't know what is happening, but whatever the position of my government is, I support it fully." He was held for nearly eight years, from July 1965 to February 1973, four of them in solitary confinement, and later became a rear admiral and a US senator from Alabama.

It is a stark illustration of what Morse can do: carry a message through a channel no one else controls.

Learning it

Morse is a motor skill, like an instrument - you learn it by ear, a few focused minutes a day, and it costs nothing but practice. The trick is to learn the sounds from the first minute and never the dots and dashes on a chart. I've put the method that actually works, the free tools that teach it, and a reference card on their own page: how to learn Morse code.

Why bother, in an emergency site's words

Because a Morse signal is the toughest thing you can put on the air. Strip a transmission down to bare on-and-off and it will get through on a fraction of the power, through noise and fading that swallow voice completely - which is exactly the condition that matters when the network is down and conditions are bad. You don't need it for a license, and you may never send it in a real emergency. But it is the deepest fallback the craft has, it costs nothing but practice, and one prisoner of war proved that as long as you can blink, you are never fully cut off.