Which phonetic alphabet word is used for the letter "S"?

The correct phonetic alphabet word for the letter "S" is Sierra. The phonetic alphabet, also known as the NATO alphabet or ICAO phonetic alphabet, is used to ensure clarity and prevent miscommunication, especially in aviation and military communications. Each letter of the English alphabet is represented by a unique word, and "S" corresponds to "Sierra."

Understanding the phonetic alphabet is crucial for effective communication in aviation, as it minimizes the risk of misunderstandings that can arise from similar-sounding letters, particularly over radio transmissions where clarity is vital. This mastery of the alphabet is part of ensuring safety and precision in flight operations and is critical for remote pilots as outlined by FAA regulations.

The other choices represent different letters: Tango stands for "T," Uniform for "U," and Victor for "V." Knowing the correct word for each letter is essential for proper communication in the field.