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International morse code

 

 

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International morse code

 

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International morse code

 

 

 

Source : http://www.walawi.com/International%20Morse%20Code.doc

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Author : not indicated on the source document of the above text

 

PROSIGNS:

Prosigns in Morse Code, are used to supplement a message. For instance, it allows a listener to hear when a message is about to be transmitted to give them time to prepare. It tells the sender the receiver has received and understood a message, and even makes allowances for errors in communication. A table of common Prosigns are below:

 

Character(s)	Code	Character(s)	Code	Character(s)	Code
Wait	· - · · ·	Error	· · · · · · · ·	Understood	· · · - ·
Invitation to transmit	- · -	End of work	· · · - · -	Starting Signal	- · - · -

 

HISTORY:

Morse Code was officially designed by Samuel Morse, an American Painter. Morse started experimenting with electromagnets and thought up a system of communication using the electromagnets and a ream of paper, which the magnets would indent onto the paper. Initially Morse’s system used a large dictionary and the number of marks on the page would represent a word which you would have to look up. This system whilst effective was extremely slow, and inefficient.

Samuel Morse then met Alfred Vail, a young 30 year old with a head full of ideas for improving Morse’s system. He modified the code and changed the symbols to that of a series of dots and lines which each represented a letter of the alphabet, spelling out a message. He did this by reading through articles in a newspaper and counting the most common letters to give the shortest symbols, leaving the longer symbols for rarely used letters.

On May 24, 1844, the first telegraph message 'What hath God wrought', was sent electrically using Morse Code. Morse code has now been used for over 160 years, only outdated by Semaphores which were used in Roman times.

Morse code was soon replaced as the most common form of communication technology but its uses are still endless today. Morse Code is an international language used by the military, amateur radio operators, pilots, air traffic controllers, and the Morse Code message of ‘SOS’ is still recognised as an international signal of distress. Lastly, if it weren’t for Morse code, telegrams could not have morphed into Telephones, and we all know how vital mobiles are to modern life. Barcodes which are on every product imaginable nowadays also came from Morse code. The bars are narrow and wide much like the dots and dashes of the Morse code system of Communication.

Samuel Morse was also the first inventor of fire engine pumps and marble-cutting machines.

 

 

Source : http://geraldtonescc.weebly.com/uploads/5/8/8/3/5883616/morse_code_alphabet.docx

Web site link: http://geraldtonescc.weebly.com/

Author : not indicated on the source document of the above text

 

Morse Code

In 1835, Samuel Morse proved that signals could be sent by wire. He used pulses of electric current to move a marker to write codes on a strip of paper. He invented
Morse Code.

 

 

 

 

 

 

 

 

 

 

Overland telegraph lines were built.
Before this letters and messages could take weeks
or months to arrive. 
Letters were sent by ship, or overland by horse.
There were no phones yet.

 

 

Morse code is made up of dots and dashes for each
letter and number.

S M S   l l l  - - l l l   

You may hear this when a mobile phone gets a text message.

 

S O S   l l l  - - - l l l   

This is a call for help.
It is the International Standard Distress Signal.

 

It is used around the world. 

 

Morse Code can be sent using sound or light.

Ships at sea do this. It is used in emergencies to send

calls of help.

 

 

 

 

 

 

 

 In planes pilots use radio navigation aids.
They use Morse Code to check if the radio is working properly.

Radio stations send out their ID using Morse Code.

 

 

 

 

 

 

Source : http://en.islcollective.com/wuploads/worksheet/islcollective_worksheets_elementary_a1_preintermediate_a2_elementary_school_high_schoo_morse_code_231864de18b75f04352_96446114.docx

Web site link: http://en.islcollective.com/

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International morse code

 

 

International morse code

 

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