The History of Morse Code: From Telegraph to Smartphone

Morse code has one of the longest lifespans of any communication technology. Invented in the 1830s, it's still used today — nearly 200 years later.

The Invention (1830s-1840s)

Samuel F.B. Morse was a painter, not an engineer. The idea for the electric telegraph came to him during a ship voyage in 1832, after a conversation about electromagnetism.

Working with machinist Alfred Vail, Morse developed both the telegraph device and the encoding system. Key milestones:

• 1838: First public demonstration of the telegraph
• 1844: Morse sent "What hath God wrought" from Washington D.C. to Baltimore — the first long-distance telegraph message
• 1848: Friedrich Clemens Gerke revised the code into what would become International Morse Code

The Telegraph Era (1850s-1900s)

The telegraph transformed communication:

• 1851: The first undersea cable connected England and France
• 1858: The first transatlantic telegraph cable was laid (it failed after 3 weeks, but a permanent one followed in 1866)
• 1860s-1890s: Telegraph networks spread worldwide, enabling near-instant international communication for the first time in human history

Professional telegraph operators could send and receive at 20-30 WPM (words per minute), with champions exceeding 50 WPM.

Maritime Communication (1900s-1990s)

Wireless telegraphy (radio) brought Morse code to ships:

• 1899: First use of wireless distress signals at sea
• 1909: SS Republic sends CQD distress signal after collision — all passengers rescued
• 1912: RMS Titanic sends both CQD and SOS — one of the most famous distress calls in history
• 1920s-1990s: Morse code was the primary maritime communication method
• 1999: The Global Maritime Distress and Safety System (GMDSS) officially replaced Morse code for maritime use

Wartime Use

Morse code played critical roles in both World Wars:

World War I

• Front-line communication via telegraph and signal lamps
• Naval communications relied heavily on Morse

World War II

• Resistance movements used Morse code radio transmissions
• Military communications were encoded in Morse before being encrypted
• Signal lamps used Morse between ships to maintain radio silence

Amateur Radio (1900s-Present)

Ham radio operators kept Morse code alive:

• For decades, passing a Morse code proficiency test was required for amateur radio licenses
• The FCC dropped the Morse code requirement in 2007
• Despite this, many ham operators still actively use Morse (called "CW" — continuous wave)
• CW contests and QSO parties remain popular events

Modern Revival

Morse code has found new life in the digital age:

• Accessibility: Morse code input methods help people with disabilities communicate (Google's Gboard supports Morse input)
• Smartwatches: Some watches can vibrate Morse code notifications
• Survival: Morse remains taught in outdoor survival courses
• Maker community: LED and laser Morse code projects are popular
• Mobile apps: Apps like Morse Code bring real-time Morse decoding and transmission to smartphones

Try It Yourself

The best way to appreciate Morse code is to use it. The Morse Code app lets you decode light signals with your camera, transmit messages via flashlight, and learn the code interactively — all on your phone.

Download free for iOS or Android.