ok so ive been licensed about 4 months now and i mostly do 2m FM on the local repeaters and occasionally some HF when conditions are decent. my question is kind of dumb but here goes — is there like a rule about when you have to use the NATO phonetics vs just saying the letter normally? like if someone asks me to confirm my callsign do i HAVE to say november alpha five tango yankee or can i just say N-A-5-T-Y and people will get it fine?

i ask because sometimes i hear people on the repeater just spell things out normally and sometimes they go full phonetic and i cant figure out if theres a rule or if its just preference. also some of the older guys seem to get kind of annoyed if you dont use proper phonetics but nobody has actually explained to me why it matters that much on a clear FM signal where you can hear everything fine

also i noticed some people use weird non-nato words sometimes like they'll say 'Texas' instead of 'Tango' or whatever. is that a thing or are they just doing it wrong

no rule that says you have to use them on a clear FM repeater, its really more of a convention and honestly good habit to build. the reason it matters is that on HF or during any kind of weak signal or noisy conditions certain letters just sound identical — B and D, M and N, S and F, etc. if you're used to just spelling things out normally you'll get caught off guard when conditions are bad and someone cant copy you.

the guys using 'Texas' for T or 'Boston' for B are using what some people call 'American phonetics' or just regional habit. it's not wrong exactly but it can cause confusion if youre ever talking to someone overseas who only knows NATO, which is kind of the whole point of having a standard in the first place. ive worked stations that had no idea what i meant when i said something off-script.

honestly just learn the NATO ones and use them all the time even when you dont need to. it becomes automatic after a while and you'll be glad you did when you finally get into a pile-up or something where conditions are rough

the annoyed old timers thing is real lol, dont worry about it too much. some of them act like using 'November' instead of just 'N' is some sacred duty. it's not. that said the point about it becoming habit is legit — i used to just say letters and then i got on HF and completely fell apart trying to give my call during a contest because i hadnt practiced and suddenly B and P sounded the same through the noise

also worth knowing you dont have to use phonetics for numbers, nobody says 'niner' in casual conversation on a local repeater, well okay some people do but you know what i mean