so ive been licensed for about 4 months now and im still confused about when youre supposed to use the NATO phonetics vs just saying the letter normally. like if someone asks me to confirm a letter in my callsign do i always have to say Whiskey or whatever or is it fine to just say the letter W. i hear some people on the air just say letters and other people go full phonetic every single time and i cant figure out if theres a rule or if its just preference. also sometimes i hear people use non-standard ones like some guy said "Washington" instead of "Whiskey" the other day and i wasnt sure if that was wrong or just an old habit. is there an actual requirement or is it more of a courtesy thing

There's no hard rule that says you MUST use NATO phonetics in casual conversation on repeaters or whatever, but the whole point of them is to reduce confusion when conditions are bad or the other station can't quite copy you. Like W and Y can sound really similar if there's any noise on the frequency. On HF especially when youre dealing with someone whos maybe not a native English speaker or theres QRM, going full phonetic just makes sense.

The "Washington" thing is totally normal, you'll hear older hams use stuff like that all the time. Before NATO standardized everything people used all kinds of regional phonetics and some folks just never switched. It's not wrong exactly but it can cause confusion if the other person doesn't know what word you're using. Heard a guy use "Europe" for E once and it took me a second to figure out what he was saying.

For your callsign specifically, most people go phonetic at least on first contact or when theyre signing, then drop to just letters once you've established comms. That's just how it tends to go in practice.

yeah same boat as you a while back, i just kind of picked it up by listening. honestly on a local repeater nobody really cares and you hear people do it both ways. where it matters is like contesting or if you work DX and the pile is a mess, then if you dont use proper phonetics people will walk all over your call and you'll never get through. i messed up my suffix once during a contest because i said something dumb like "item" for I instead of India and the other op logged me wrong, had to send a correction later. so i guess the answer is it depends but when it counts just use the standard ones