Fillable Printable Morse Code Worksheet
Fillable Printable Morse Code Worksheet
Morse Code Worksheet
MORSE CODE WORKSHEET
Morse Code History:
Morse Code is a type of character encoding that transmits telegraphic information using rhythm. Morse Code uses a standardized sequence of
short and long elements to represent the letters, numerals, punctuation and special characters of a given message. The short and long elements
can be formed by sounds, marks, or pulses, in on off keying and are commonly known as "dots" and "dashes" or "dits" and "dahs". The speed of
Morse Code is measured in words per minute (WPM) or characters per minute, while fixed-length data forms of telecommunication transmission
are usually measured in baud or bps.
Originally created for Samuel F. B. Morse's electric telegraph in the early 1840s, Morse Code was also extensively used for early radio
communication beginning in the 1890s. For the first half of the twentieth century, the majority of high-speed international communication was
conducted in Morse Code, using telegraph lines, undersea cables, and radio
circuits. However, the variable length of the Morse characters made it hard to
adapt to automated circuits, so for most electronic communication it has been
replaced by machine readable formats, such as Baudot code and ASCII.
The most popular current use of Morse Code is by amateur radio operators,
although it is no longer a requirement for amateur licensing in many countries. In
the professional field, pilots and air traffic controllers are usually familiar with
Morse Code and require a basic understanding. Navigational aids in the field of
aviation, such as VORs and NDBs, constantly transmit their identity in Morse Code.
Morse Code is designed to be read by humans without a decoding device, making
it useful for sending automated digital data in voice channels. For emergency
signaling, Morse Code can be sent by way of improvised sources that can be easily
"keyed" on and off, making Morse Code one of the most versatile methods of
telecommunication in existence.
Morse Code Communications and Characters
MORSE CODE ALPHABET
A: • ―
N: ― •
B: ― • • •
O: ― ― ―
C: ― • ― •
P: • ― ― •
CH: ― ― ― ―
Q: ― ― • ―
D: ― • •
R: • ― •
E: •
S: • • •
F: • • ― •
T: ―
G: ― ― •
U: • • ―
H: • • • •
V: • • • ―
I: • •
W: • ― ―
J: • ― ― ―
X: ― • • ―
K: ― • ―
Y: ― • ― ―
L: • ― • •
Z: ― ― • •
M: ― ―
MORSE CODE ALPHABET OPPOSITES
E: •
T: ―
I: • •
M: ― ―
S: • • •
O: ― ― ―
H: • • • •
CH: ― ― ― ―
A: • ―
N: ― •
W: • ― ―
D: ― • •
J: • ― ― ―
B: ― • • •
R: • ― •
K: ― • ―
P: • ― ― •
X: ― • • ―
L: • ― • •
Y: ― • ― ―
F: • • ― •
Q: ― ― • ―
U: • • ―
G: ― ― •
V: • • • ―
Z: ― ― • •
C: ― • ― •
NGƯỜI ĐÁNH TIN
CODE
Mời Nhận Bản Tin; (AAAA):
• ― / • ― / • ― / • ―
Truyền Lầm; (HH):
• • • • / • • • •
Hết Bản Tin; (AR):
• ― / • ― •
Cấp Cứu; (SOS):
• • • / ― ― ― / • • •
NGƯỜI NHẬN TIN
CODE
Sẵn Sàng Nhận Tin; (K):
― • ―
Xin Truyền Lại; (IMI):
• ― / • ― / • ― / • ―
Xin Đánh Chậm Lại; (VL):
• • • ― / • ― • •
Xin Chờ Đợi; (AS):
• ― / • • •
Thổi Lại Chữ Trước; (C):
― • ― •
Hiểu Rồi; (R):
• ― •
SENDER
CODE
Attention Prepare to receive; (AAAA):
• ― / • ― / • ― / • ―
Error in message; (HH):
• • • • / • • • •
End of message; (AR):
• ― / • ― •
Emergency: (SOS):
• • • / ― ― ― / • • •
RECEIVER
CODE
Ready to receive; (K):
― • ―
Please transmit again; (IMI):
• • / ― ― / • •
Please transmit slower; (VL):
• • • ― / • ― • •
Please wait; (AS):
• ― / • • •
Trasmit previous letter; (C):
― • ― •
Understood; (R):
• ― •
Dùng Morse trong sinh hoạt Phong Trào
- Truyền tin là một trong các môn thích thú nhất trong
sinh hoạt đoàn.
- Trong sinh hoạt mật mã Morse được dùng liên lạc khi
ở xa tầm tiếng nói, hay mắt nhìn; chẳng hạn khi tập
họp Ðoàn Sinh và đặc biệt trong các Hành Trình Đức
Tin trại.
- Mặt khác, các mật thư được dùng trong Phong Trào,
phần lớn đều quy thuận vào mật mã Morse.
- Ðặc điểm của mật mã Morse là để luyện tinh thần
đồng đội; cùng học, cùng chơi, cùng truyền tin.
- Morse cũng dạy tính cần cù nhẫn nại mà các thiếu
sinh cần tập luyện.
Morse Code Numbers
1: • ― ― ― ―
6: ― • • • •
2: • • ― ― ―
7: ― ― • • •
3: • • • ― ―
8: ― ― ― • •
4: • • • • ―
9: ― ― ― ― •
5: • • • • •
0: ― ― ― ― ―
Accent Marks
Letter Accents
Dấu Sác: (S)
Chữ Â: (AA)
Dấu Huyền: (Q)
Chữ Ă: (AW)
Dấu Hỏi: (Z)
Chữ Đ: (DD)
Dấu Ngã: (X)
Chữ Ê: (EE)
Dấu Nặng: (J)
Chữ Ô: (OO)
Chữ Ơ: (OW)
Chữ Ư: (UW)
Chữ ƯƠ: (OUW)
Morse Code Tower
Representation and Timing
International Morse code is composed of five elements:
short mark, dot or 'dit' (•); measures one unit long
longer mark, dash or 'dah' (―); measures three units long (three times longer that the dot)
intra-character gap (between the dots and dashes within a character); measures one unit long
short gap (between letters); measures three units long
medium gap (between words); measures seven units long
Morse code can be transmitted in a number of ways: originally as electrical pulses along a telegraph wire, but also as an audio tone, a radio signal with
short and long tones, or as a mechanical or visual signal (e.g. a flashing light) using devices like an Aldis lamp or a heliograph.
Morse messages are generally transmitted by a hand-operated device such as a telegraph key, so there are variations introduced by the skill of the
sender and receiver - more experienced operators can send and receive at faster speeds. In addition, individual operators differ slightly, for example
using slightly longer or shorter dashes or gaps, perhaps only for particular characters. This is called their "fist", and receivers can recognize specific
individuals by it alone.
The speed of Morse code is measured in wpm or cpm, according to the Paris standard which defines the speed of Morse transmission as the timing
needed to send the word "Paris" a given number of times per minute. The word Paris is used because it is representative for a typical text in the English
language, and the choice was influenced by the fact that the decision was taken at the International Telegraph Conference in Paris 1865.
Techniques on How to Learn Morse Code
People learning Morse code using the Farnsworth method, named for Donald R. "Russ" Farnsworth, also known by his call sign, W6TTB, are taught to
send and receive letters and other symbols at their full target speed, that is with normal relative timing of the dots, dashes and spaces within each
symbol for that speed. However, initially exaggerated spaces between symbols and words are used, to give "thinking time" to make the sound "shape"
of the letters and symbols easier to learn. The spacing can then be reduced with practice and familiarity.
Another popular teaching method is the Koch method, named after German psychologist Ludwig Koch, which uses the full target speed from the outset,
but begins with just two characters. Once strings containing those two characters can be copied with 90% accuracy, an additional character is added,
and so on until the full character set is mastered.
One last method that usually works is PRACTICE, PRACTICE, PRACTICE.
