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Letter S

What is S in Morse Code?

The Morse code for S is ....

S...

Breakdown

S consists of dot, dot, dot — 3 dots and 0 dash. It is a fairly short signal compared with most letters.

Timing Structure

· Dot: about 1 time unit
· Dash: about 3 time units
· S takes 5 units in total: 3 dots (3 units) + 2 gaps (2 units) + 0 dash (0 units)

Memory Trick

"di-di-dit" — three short taps, the opening of SOS.

Example Words

SIERRA ... .. . .-. .-. .-
STOP ... - --- .--.
START ... - .- .-. -

Similar Characters

O (---)Mirror images: three dots vs three dashes.
H (....)S is three dots, H is four — count them.

Practice This Character

Ready to test yourself? The quiz picks characters at random, so jump in and focus on S (...) when it appears.

Practice S in the Quiz