The spelling of "NOAAFSL" follows the International Phonetic Alphabet (IPA) symbols for each letter. "N" represents the voiced alveolar nasal sound, "O" represents the diphthong /oʊ/, "A" represents the short vowel sound /æ/, "A" represents the same sound, "F" represents the voiceless labiodental fricative /f/, "S" represents the voiceless alveolar fricative /s/, and "L" represents the voiced alveolar lateral approximant /l/. Therefore, the correct pronunciation of "NOAAFSL" would be /noʊæfsəl/.