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Chuyên Môn
SEMAPHORE
Flag semaphore is a system for conveying information at a distance by means of visual signals with handheld flags, rods, disks, paddles, or occasionally bare or gloved hands invented by a Frenchman, Claude Chappe in 1793.
PHƯƠNG HƯỚNG
Wilderness legend Daniel Boone once wrote, "I have never been lost, but I will admit to being confused for several weeks."
MORSE CODE
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.
DẤU ĐƯỜNG
Khi xưa, ba Vua đi tìm Chúa Hài Nhi đã được một ngôi sao sáng dẫn đường cho các ngài đi tới nơi và bái lạy. Nay trong Phong Trào Thiếu Nhi Thánh Thể, dấu đường được dùng trong các hạnh trình đức tin để giúp ta thuật lại và tìm tới một mục điểm nào đó trong Kinh Thánh.