Field Manual / Phonetic alphabet / SIERRA
SIERRA
PHONETICS · Say: SEE-AIR-RAH
NATO phonetic alphabet code word for the letter S.
On air
“Call sign S6Z: SIERRA SIX ZULU.”
“I spell: SIERRA...”
“Sierra Two, this is Bravo One. Observe the road junction. Over.”
“River name, I spell: Sierra, Echo, Tango, Hotel. Over.”
In conversation
Sierra is the code word for S; say see-AIR-rah.