50 Fun Facts About Morse Code

What are the two signal elements of Morse code called?

They are also written as dots and dashes.

A dah lasts how many dit-lengths?

The gap between letters is three dits.

How many dit-lengths of silence separate words in Morse code?

Letters within a word are separated by a three-dit space.

Which letter of the alphabet is a single dit in Morse?

As the most common English letter it was given the shortest code.

Who developed the alphabet-based code that replaced Samuel Morse's original proposal?

Morse had planned a very different scheme using a codebook.

How did Morse's engineer estimate how often each letter appears in English?

He visited the type cases of a local paper in Morristown, New Jersey.

What had Samuel Morse originally planned to transmit instead of letters?

Each number would be looked up in a codebook to find the word.

At which family works in Morristown did Vail refine Morse's prototype telegraph?

He did it at his own expense in return for 25 percent of the proceeds.

Which German simplified Vail's code into the version adopted in Europe?

He created it in 1848 for the Hamburg–Cuxhaven telegraph and changed nearly half the alphabet.

In which city was International Morse Code standardised in May 1865?

The International Telegraph Convention finalised it after a complete revision of the numerals.

Which four letters kept their original Morse codes through all the revisions?

K and N had their short dahs lengthened to full length.

Which letter did Gerke's code not distinguish, requiring a new codepoint in 1865?

Gerke treated I and J as one letter.

What was Vail's original American version also known as?

US railroads largely phased it out by the mid-1950s.

What message officially opened the Baltimore–Washington line on 24 May 1844?

Morse sent it from the Supreme Court chamber in the basement of the Capitol.

How much did Congress appropriate in 1843 for the experimental Washington–Baltimore line?

The 38-mile line ran along the Baltimore and Ohio Railroad right of way.

What news was telegraphed from Baltimore to the Capitol on 1 May 1844 in an early demonstration?

The official opening followed on 24 May.

What was Samuel Morse's profession before the telegraph?

He co-developed the code in 1837 in his middle age.

Which country first adopted SOS as a distress signal, on 1 April 1905?

It called it the Notzeichen signal.

What did SOS originally stand for?

The backronyms came later in popular usage.

When did SOS become a worldwide standard under the 1906 Berlin convention?

The first International Radiotelegraph Convention signed the agreement on 3 November 1906.

Which company's Circular 57 of 1904 made a three-letter distress call standard for its ships?

Its call was never adopted internationally because it could be mistaken for a plain general call.

Which distress call did Titanic's Jack Phillips send first on 15 April 1912?

It was still commonly used by British ships in 1912.

How is the SOS prosign different from the three letters S, O and S?

Its meaning is: this is the start of a distress message.

Which two standard words are used to measure Morse speed in words per minute?

Speeds measured with the two words can differ by up to 20 percent.

Who set the still-standing Morse copying record of 75.2 WPM in 1939?

The contest was held in Asheville, North Carolina.

What speed did Harry Turner reach with a straight key in 1942, the fastest ever sent that way?

Semi-automatic and electronic keyers allow much faster sending.

Which POW blinked the word TORTURE in Morse during a 1966 North Vietnamese TV appearance?

His captors did not notice the eye-blinks.

Which letter's Morse rhythm matches the opening of Beethoven's Fifth Symphony?

Churchill promoted the di-di-di-dah as V for Victory and the BBC played the phrase before broadcasts.

Which phrase is a mnemonic for the Morse letter Q, dah dah di dah?

Did she like it? is the mnemonic for F.

What replaced Morse as the international maritime distress standard in 1999?

The US Coast Guard no longer monitors the 500 kHz Morse distress frequency.

What did the last US commercial Morse transmission in July 1999 sign off with?

It echoed Morse's original 1844 message.

How did the French Navy end its final Morse message on 31 January 1997?

It began Calling all.

In which year did the FCC drop Morse proficiency from all US amateur radio licences?

A world conference had made it optional internationally four years earlier.

What speed did the FCC's Amateur Extra Class licence require until 2000?

It was cut to 5 WPM in April 2000 and later abolished altogether.

At roughly what speed do aviation navigation beacons such as VORs send their Morse identifiers?

Some modern receivers translate the code into displayed letters.

What are mechanical semi-automatic Morse keyers informally called?

Fully automatic electronic keyers use single or iambic double paddles.

How many Morse marks did Andrei Bindasov transmit in one minute for a 2005 Guinness record?

The championship was held in Primorsko, Bulgaria.

What are the special unwritten procedural signals in Morse called?

Almost all also encode special characters such as + or =.

The unofficial Morse for the ampersand, AS, is also the official prosign for what?

The symbols !, $ and & are not defined in the official ITU code.

Which International Morse code does Greek Morse reuse for the letter Ψ?

Q has no corresponding letter in modern Greek.

Besides A–Z and 0–9, which single accented letter does ITU International Morse encode?

There is no distinction between upper and lower case.

Which famous 1927 flight carried no radio at all, leaving its pilot incommunicado?

Morse code in aviation only began regular use in the mid-1920s.

Who patented the first commercial telegraph in June 1837 and demonstrated it on the London and Birmingham Railway?

Their receivers used electromagnets and needles.

Roughly how many of Australia's 12,000 radio amateurs were regular Morse users at the end of 2025?

About 700 practised the code; a committed learner needs three to four months.

Which painting did Samuel Morse set aside in 1832 after conceiving the single-wire telegraph at sea?

He got the idea watching Charles Thomas Jackson's electromagnet experiments on the voyage home from Europe.

Who chose the words 'What hath God wrought' for the first official telegraph message in 1844?

The daughter of Patent Commissioner Henry Leavitt Ellsworth picked the phrase from Numbers 23:23; her father had secured Morse's early funding.

From which room in the US Capitol did Morse send the first message to Baltimore?

The message travelled to the B&O's Mount Clare Station, and the early telegraph could send about thirty characters a minute.

In 1832 Morse became America's first professor of painting and sculpture at which institution?

The school is now New York University; in 1839 he met Louis Daguerre in Paris and helped publicise photography in America.

Besides the telegraph, Morse invented a machine for doing what that he could not patent?

An existing 1820 design by Thomas Blanchard blocked the patent.

In which year was a bronze statue of Samuel Morse unveiled in New York's Central Park?

It was his first real recognition at home after years of foreign honours; his portrait later appeared on an 1896 two-dollar silver certificate.