O in Morse code

O is dash dash dash: ---

O---

Remembering O

It sounds like dah-dah-dah. Say it out loud as you listen, and learn the rhythm rather than counting dots and dashes.
O has 3 signals: 3 dashes. It takes 11 units of time to send, where a dot is one unit.
O is roughly the 4th most common letter in English. Morse code gives the shortest codes to the commonest letters, which is why O is quick to send.
Swap every dot for a dash and every dash for a dot and you get S (...). Learning opposite pairs together helps them stick.

Translate your own words with the Morse code translator, see every letter on the Morse code alphabet chart, or practise sending on the decoder.

() => `

${esc(u('mcSettings'))}

${esc(u('mcSpeed'))}: ${esc(u('mcWpm'))} ${esc(u('mcFarns'))}: ${esc(u('mcWpm'))} ${esc(u('mcTone'))}: Hz ${esc(u('mcVol'))}:

${esc(u('mcFlash'))}

${esc(u('mcWarn'))}

${esc(u('mcVib'))}