ok so i've been licensed about 8 months and i still feel weird about this. like i know the nato phonetic alphabet, alpha bravo charlie etc, but i dont always know when im supposed to use it vs just saying the letter normally. on my local repeater nobody really uses phonetics much except when giving their callsign sometimes, but then i hear guys on HF using them constantly for everything. is there like an actual rule or is it just kind of a feel thing based on conditions? also sometimes people use non-nato words, heard a guy say 'america' instead of 'alpha' the other day and i wasn't sure if that was just an old habit or if thats actually acceptable. i dont want to sound like an idiot either way so i've just been kind of winging it

yeah its pretty much a feel thing honestly. the general idea is you use phonetics when there's any chance the letter could be misunderstood -- weak signal, noise, accents, whatever. on a clear local repeater with guys you talk to every week, nobody really cares. but on HF especially during a pileup or if conditions are rough you pretty much always use them for callsigns at minimum or people will come back to you with the wrong call.

the non-nato thing is super common with older hams, you'll hear 'adam baker charlie' which is the old US military phonetics from before NATO standardized everything. its not wrong exactly but it does cause confusion sometimes because not everyone knows them, especially foreign stations. i had a guy in japan come back to me with a completely wrong callsign once because i said something unclear and wasnt using proper phonetics. learned my lesson pretty quick after that

honestly same boat as you a year ago. what clicked for me was just thinking about it like -- if you had to spell it out to somebody over a really bad phone connection, would you use phonetics? then use them on air too. i pretty much always phonetic my callsign now even on the local repeater just out of habit, takes like two extra seconds and avoids any confusion. people won't think you're weird for it