ok so ive been licensed for about 8 months now and i still feel weird about this. like when do you actually need to use the full NATO phonetics vs just saying the letter? i know on HF when propagation is bad it makes sense but on my local 2m repeater everyone just says their callsign normally without spelling it out phonetically and it sounds fine. but then sometimes ill hear someone go full alpha bravo charlie on a clear repeater and it seems like overkill? im not sure if theres an actual rule about this or if its just feel-based. also i sometimes mess up and say something dumb like uh... november for N and then forget what K is and just say K which probably sounds stupid. is there like a standard expectation for when you're supposed to use them vs not

there's no hard rule honestly, it's more situational. on a clear local repeater nobody really cares if you just read your call straight out, people know the phonetics without you spelling it out. where it really matters is HF, especially DX pileups or when conditions are rough and someone's trying to log your call correctly. i've had QSOs where i said my suffix three times and the other op still wrote it down wrong because two of my letters sound similar. after that i started just defaulting to phonetics for my suffix at minimum even on decent bands. the NATO alphabet is what you want to stick to by the way, some guys use words like 'chicago' or 'easy' and while it works fine on a clear freq it can cause confusion. just drill the standard ones and eventually it becomes automatic, you wont have to think about it

yeah K is Kilo lol dont feel bad i blanked on Uniform for like my first year and just said U which... worked fine most of the time. i think for the repeater you're totally fine just saying your call normally. the phonetics thing really clicked for me the first time i tried a pileup and realized nobody could hear anything i was saying without them. now i use them basically anytime im not 100% sure the other station has solid copy on me