ok so i got my tech license a couple months ago and ive been on 2m mostly just doing local repeater stuff. my question is about phonetics — like i know the NATO ones, Alpha Bravo Charlie etc, but when is it actually required vs just saying the letter normally. like if someone asks for my callsign do i always spell it out phonetically or only sometimes

i feel like ive heard people on the repeater just say their letters normally when the signal is good and then other times they go full phonetic. is there a rule or is it just kind of a feel thing. also i noticed some of the older guys use different words than the NATO standard, like i heard someone say "sugar" instead of Sierra and "king" instead of Kilo. is that a regional thing or just old habit

yeah theres no hard rule that says you MUST use phonetics every single time, its more just best practice especially when theres any chance of confusion. on a clear local repeater with a strong signal you can usually get away with just saying the letters and people will copy you fine. but on HF or when the band is noisy or youre working someone who doesnt know your call, phonetics really help cut down on the back and forth.

the sugar/king stuff is just old timers using what they learned before NATO standardized everything. used to be a lot of regional and military variations floating around. the NATO alphabet became the standard for good reason — if youre ever doing anything cross-border or with emergency comms groups its the one everyone agrees on. i still hear "Adam" for Alpha from guys who came up through old ARRL materials. doesnt really matter on a local repeater but if youre doing ARES or anything like that just stick to the NATO ones, avoids any confusion.

honestly i just use phonetics whenever im not 100% sure they got it. if someone confirms my call back correctly i wont bother spelling it out again. but yeah the feel thing is pretty accurate, you kind of develop an ear for when the signal is marginal enough to warrant it