so ive been listening to a lot of QSOs on 40m and noticed some people use the standard NATO stuff like Alpha Bravo Charlie and others just kind of make up their own like they'll say something like "A for apple, B for Boston" whatever comes to mind. i got my tech last year and been slowly getting more comfortable actually transmitting but this has been bugging me. is there like a rule somewhere that says you have to use NATO or is it just the done thing because everyone knows it? i dont want to sound like an idiot on air but also dont want to be overly rigid about it if nobody actually cares

no hard rule in part 97 that says you must use NATO phonetics specifically, its just convention and the reason its convention is because it actually works — those words were chosen specifically because they're distinct sounding across different accents and bad propagation. the "A for apple" stuff you hear is fine in a casual ragchew but if youre doing a contest or trying to pass a callsign through static and QRM youll really appreciate having words that dont sound like each other. i had a guy once give me his call with "S for sugar" and i heard it as "F for sugar" which made zero sense and we went back and forth three times. just learn the NATO ones and use them, it becomes automatic pretty fast.

honestly when i first got on air i was so nervous about the phonetics that i'd blank on them mid-callsign and just say the letter by itself which is way worse lol. i printed out a little card and taped it next to my radio for like the first month. most people are pretty patient if youre clearly still learning but yeah the NATO ones are what everyone expects to hear so thats what you want to go with. some of the old timers use things like "Radio" for R instead of Romeo and nobody really bats an eye but for a newer person i'd just stick with the standard