{"id":16558,"date":"2019-05-24T03:01:31","date_gmt":"2019-05-24T03:01:31","guid":{"rendered":"https:\/\/www.lifeandnews.com\/articles\/?p=16558"},"modified":"2019-05-25T04:30:46","modified_gmt":"2019-05-25T04:30:46","slug":"simply-elegant-morse-code-marks-175-years-and-counting","status":"publish","type":"post","link":"https:\/\/www.lifeandnews.com\/articles\/simply-elegant-morse-code-marks-175-years-and-counting\/","title":{"rendered":"Simply elegant, Morse code marks 175 years and counting"},"content":{"rendered":"

Eddie King<\/a>, University of South Carolina<\/a><\/em><\/span><\/p>\n

The first message sent by Morse code\u2019s dots and dashes across a long distance traveled from Washington, D.C., to Baltimore on Friday, May 24, 1844 \u2013 175 years ago. It signaled the first time in human history that complex thoughts could be communicated at long distances almost instantaneously. Until then<\/a>, people had to have face-to-face conversations; send coded messages through drums<\/a>, smoke signals<\/a> and semaphore systems<\/a>; or read printed words.<\/p>\n

Thanks to Samuel F.B. Morse, communication changed rapidly, and has been changing ever faster since. He invented the electric telegraph in 1832. It took six more years for him to standardize a code for communicating over telegraph wires. In 1843, Congress gave him US$30,000<\/a> to string wires between the nation\u2019s capital and nearby Baltimore. When the line was completed, he conducted a public demonstration of long-distance communication.<\/p>\n

Morse wasn\u2019t the only one working to develop a means of communicating over the telegraph<\/a>, but his is the one that has survived. The wires, magnets and keys used in the initial demonstration have given way to smartphones\u2019 on-screen keyboards, but Morse code has remained fundamentally the same, and is still \u2013 perhaps surprisingly \u2013 relevant in the 21st century. Although I have learned, and relearned, it many times as a Boy Scout, an amateur radio operator and a pilot, I continue to admire it and strive to master it.<\/p>\n

\n \"\"<\/a>
\n Samuel F.B. Morse\u2019s own handwritten record of the first Morse code message ever sent, on May 24, 1844.<\/span>
\n Library of Congress<\/a><\/span>
\n <\/figcaption><\/figure>\n

Easy sending<\/h2>\n

Morse\u2019s key insight in constructing the code was considering how frequently each letter is used in English. The most commonly used letters have shorter symbols: \u201cE,\u201d which appears most often, is signified by a single \u201cdot.\u201d By contrast, \u201cZ,\u201d the least used letter<\/a> in English, was signified by the much longer and more complex \u201cdot-dot-dot (pause) dot<\/a>.\u201d <\/p>\n

In 1865, the International Telecommunications Union changed the code<\/a> to account for different character frequencies in other languages. There have been other tweaks since, but \u201cE\u201d is still \u201cdot,\u201d though \u201cZ\u201d is now \u201cdash-dash-dot-dot<\/a>.\u201d<\/p>\n

The reference to letter frequency makes for extremely efficient communications: Simple words with common letters can be transmitted very quickly. Longer words can still be sent, but they take more time.<\/p>\n

\n \"\"<\/a>
\n Samuel F.B. Morse.<\/span>
\n Library of Congress<\/a><\/span>
\n <\/figcaption><\/figure>\n

Going wireless<\/h2>\n

The communications system that Morse code was designed for \u2013 analogue connections over metal wires that carried a lot of interference and needed a clear on-off type signal to be heard \u2013 has evolved significantly.<\/p>\n

The first big change came just a few decades after Morse\u2019s demonstration. In the late 19th century, Guglielmo Marconi invented radio-telegraph equipment<\/a>, which could send Morse code over radio waves, rather than wires.<\/p>\n

The shipping industry loved this new way to communicate with ships at sea, either from ship to ship or to shore-based stations. By 1910, U.S. law required many passenger ships in U.S. waters<\/a> to carry wireless sets for sending and receiving messages. <\/p>\n

After the Titanic sank in 1912, an international agreement required some ships to assign a person to listen for radio distress signals<\/a> at all times. That same agreement designated \u201cSOS\u201d \u2013 \u201cdot-dot-dot dash-dash-dash dot-dot-dot<\/a>\u201d \u2013 as the international distress signal, not as an abbreviation for anything but because it was a simple pattern<\/a> that was easy to remember and transmit. The Coast Guard discontinued monitoring<\/a> in 1995. The requirement that ships monitor for distress signals was removed in 1999<\/a>, though the U.S. Navy still teaches at least some sailors to read, send and receive Morse code<\/a>.<\/p>\n

\n \"\"<\/a>
\n The arrow points at the chart label indicating the Morse code equivalent to the \u2018BAL\u2019 signal for a radio beacon near Baltimore.<\/span>
\n Edited screenshot of an FAA map<\/a>, CC BY-ND<\/a><\/span>
\n <\/figcaption><\/figure>\n

Aviators also use Morse code to identify automated navigational aids. These are radio beacons that help pilots follow routes, traveling from one transmitter to the next on aeronautical charts. They transmit their identifiers<\/a> \u2013 such as \u201cBAL\u201d for Baltimore \u2013 in Morse code. Pilots often learn to recognize familiar-sounding patterns of beacons in areas they fly frequently.<\/p>\n

There is a thriving community<\/a> of amateur radio operators who treasure Morse code, too. Among amateur radio operators, Morse code is a cherished tradition tracing back to the earliest days of radio. Some of them may have begun in the Boy Scouts, which has made learning Morse variably optional or required<\/a> over the years. The Federal Communications Commission used to require all licensed amateur radio operators to demonstrate proficiency in Morse code, but that ended in 2007<\/a>. The FCC does still issue commercial licenses that require Morse<\/a> proficiency, but no jobs require it anymore.<\/p>\n

Blinking Morse<\/h2>\n

Because its signals are so simple \u2013 on or off, long or short \u2013 Morse code can also be used by flashing lights. Many navies around the world use blinker lights to communicate from ship to ship when they don\u2019t want to use radios or when radio equipment breaks down. The U.S. Navy is actually testing a system that would let a user type words and convert it to blinker light<\/a>. A receiver would read the flashes and convert it back to text.<\/p>\n

Skills learned in the military helped an injured man communicate<\/a> with his wife across a rocky beach using only his flashlight in 2017.<\/p>\n

Other Morse messages<\/h2>\n

Perhaps the most notable modern use of Morse code was by Navy pilot Jeremiah Denton<\/a>, while he was a prisoner of war in Vietnam. In 1966, about one year into a nearly eight-year imprisonment, Denton was forced by his North Vietnamese captors to participate in a video interview about his treatment. While the camera focused on his face, he blinked the Morse code symbols for \u201ctorture,\u201d confirming for the first time<\/a> U.S. fears about the treatment of service members held captive in North Vietnam.<\/p>\n

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