What is Morse code?

Morse code (Morse code) is a signal code that is on and off, expressing different English letters, numbers and punctuation marks in different arrangements; its codes include five types: dot , dashes, pauses between dots and dashes, short pauses between each character, medium pauses between each word, and long pauses between sentences.

Morse code, also known as Morse code, is a signal code that is on and off, expressing different English letters, Numbers and punctuation marks. Invented in 1837, it was an early form of digital communication. Unlike modern digital communications, Morse code only uses binary codes of two states: zero and one. Its codes include five types: a short dot signal "・" and a long signal that reads "Di" and remains for a certain period of time. "—", pronounced "Da" (Da), indicates pauses between dots and dashes, medium pauses between each word, and long pauses between sentences.

How to express Morse code

In fact, there are two "symbols" used to represent characters: that is, dashes and dots, or dahs ( Dah) and Dit or long and short. The speed of sending is determined by the length of the point, and is used as a time reference for sending. The following is an illustration of time control:

Morsecode: -- --- ·-· ··· · / -·-· --- -·· ·

Here, "- " means stroke, "." means dot. This is the exact sending time of the above message ("=" means there is a signal, "." means there is no signal, each is one point in length):

===.===...= ==.===.===...=.===.=...=.=.=...=.......===.=.===.= ...===.===.===

The dash is generally the length of three dots; the interval between dots and dashes is the length of one dot; the interval between characters is three The length of a dot; and the space between words is the length of seven dots. In the beginning, beginners are generally taught to send characters with short, fast intervals between dots and dashes, and the time between symbols and words is also exaggerated. In comparison, this method is easier to learn.

People who are familiar with Morse code often speak or spell like this [where the long sound (Dah) is pronounced "awe"]:

-- --- ·-· ··· · / -·-· --- -·· ·

DahDahDahDahDahDahDiDahDitDiDiDitDit, DahDiDahDitDahDahDahDahDiDiDit.

Special symbols

These are some dot-dashes combinations with special meaning. They are used together by two letters of Morse code, which can save the necessary intermediate time when they are normally sent as two letters. Interval time.

AR: ·—·—·(Stop, message ends)

AS: ·—···(Waiting)

K: —·—( Invitation to transmit signal) (usually followed by AR, meaning "it's your turn")

SK:···—·—(termination, contact ends)

BT:—···—( delimiter)

···—·(I will resend the last word)

·· ··(Similarly)

········ (Error)

Morse Code Application

Morse Code encoding is simple and clear, with little ambiguity. The encoding is mainly represented by two characters: ".", "-", one long and one short, has many applications in many situations, such as sending distress signals. In the movie "The Wind", Moore's code is sewn on clothes to spread the message. In the anime "Detective Conan", " Reasoning duel, Shinichi vs. Okiya Subaru" (tv511) uses this method.

When using the Moore code light to call for help, the definition: the light is long as "-", and the light is short as " .", then you can use the flashlight switch to send various messages, such as distress messages.

If the light is in accordance with "short bright and dark, short bright and dark, short bright and dark, long bright and dark, long bright and dark, long bright and dark short If it is displayed according to the rule of "light, dark, short, bright, dark, short, bright", then it means the distress signal SOS.

Because the Moore code of SOS is: ··· ---- ···, according to the above regulations, that is Light coding can be performed. This coding is actually very simple, three short, three long, three short.

In addition to lights, sounds (two different sounds) can also be used to send out distress signals. This way of asking for help It is something we should all understand, and maybe it can come in handy when necessary.

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