Which letter in the phonetic alphabet is referred to as 'D'?

In the phonetic alphabet, 'D' corresponds to 'Delta.' The phonetic alphabet, also known as the NATO or ICAO phonetic alphabet, is designed to ensure clarity and eliminate confusion when spelling out words or letters over radio or telephone communications.

Each letter is represented by a unique, easily distinguishable word to avoid misunderstandings, especially in environments where audio quality may be compromised. 'Delta' is specifically selected for 'D' to maintain this clarity. Other terms like 'Echo,' 'Foxtrot,' and 'Alpha' represent different letters: 'E,' 'F,' and 'A,' respectively. These words have been assigned to ensure that every letter in the English alphabet has a corresponding phonetic representative that is phonetically distinct from one another. This distinction is critical in aviation, military, and emergency services communications.