so ive been licensed for about 8 months now and i still feel awkward about when to use the NATO phonetics vs just saying the letter. like on a clear repeater contact where everyones coming in 5x5 do you really need to say "Kilo Foxtrot Seven Sierra Sierra" or is it fine to just say your callsign normally? i see guys on the club net who just rattle off their call letters and nobody seems to have a problem. but then on HF or when things are noisy i get why you'd spell it out. is there like an unwritten rule about this or does it just depend on conditions? i dont want to sound like im overdoing it on a local 2m net but also dont want to sound sloppy on HF

honestly its mostly just feel after a while. on a local repeater with decent signal nobody really cares if you just say your call normally, most people there know you anyway. but on HF especially when the band is doing weird things or youre working someone with a thick accent or heavy QRM, phonetics can save you a lot of back and forth. i always default to phonetics when giving my call to someone who hasnt heard me before, or when conditions are marginal. once youre in a regular ragchew and the other guy clearly has your call written down, dropping them is fine. the real place phonetics matter most is contests and DX pileups where everything is fast and noisy and a B and a D or an M and an N can totally get mixed up

yeah same question bugged me when i started. what i was told is that technically the FCC doesnt require you to use phonetics at all, you just have to ID with your callsign. so theres no rule saying you have to. but practically speaking if you give your call on a noisy HF contact and dont use phonetics you might end up saying it three times anyway while the other station tries to copy it. so phonetics end up being faster even though they feel slower at first. one thing i still mess up sometimes is reverting to non-NATO phonetics under pressure, like saying "sugar" instead of Sierra or whatever my brain just defaults to. working on it