O in Morse Code

Morse representation

O is written as ---. It contains 0 dots and 3 dashes.

Character breakdown

How to type O

Type ---. A dot lasts one time unit, a dash lasts three, a letter gap lasts three units, and a word gap lasts seven.

Pattern and sound

Use Listen to hear the complete rhythm at 620 Hz. Learn it as one sound pattern instead of counting every mark; this improves recognition at higher speeds.

Examples in context

• Translate O in a complete message.
• Listen to O at different speeds.
• Practice recalling --- without the chart.

Practice this signal

Listen once, repeat the rhythm, then enter it from memory. Short daily sessions build more reliable recognition than visual memorization alone.