Basic

OK in Morse Code

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OK - Character-by-Character Breakdown

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Transmitting Morse Code: Timing and Spacing Rules

When transmitting Morse code, timing is the most critical element for readability. Morse code is structured around a basic time unit called the **dit duration** (or dot duration). The length of a single dash (dah) is exactly three times the duration of a dot. Every element within a single letter is separated by a silent gap equal to one dot. The space between two letters in the same word is equal to three dots, while the silent interval between separate words is seven dots. Memorizing these relative spacing ratios is essential for clear communication, whether sending signals by telegraph, radio keyer, visual light, or physical tapping.

Common Morse Code Abbreviations & Prosigns

Real-world operators rarely spell out every letter. To save time and bandwidth, they use standard CW abbreviations and procedural signals (prosigns). For example, **CQ** is a general call to any station, inviting a conversation. **K** is sent at the end of a transmission to mean 'over' (go ahead and transmit), while **AR** signals the end of a message. **SK** is used to signal 'out' or the complete termination of the contact. Other common abbreviations include **73** (best regards), **OM** (old man, a friendly term for another operator), and **QSL** (confirming receipt of a message). Understanding these shorthand codes allows operators to communicate complex ideas rapidly.