I have just started really applying myself toward learning CW, and I don't understand why I see different patterns for the question mark? I thought for sure it was ..--.. Source (and what I hear on air in HL land, where I am now): http://naqcc.info/cw_abbr.html But then I listen to the ARRL audio files, and it's -...- http://www.arrl.org/files/file/Morse/Archive/5 WPM/180103_05WPM.mp3 Is it different, by region? The first source I listed says -...- is an equal sign or double-dash. I am Confused? Who is correct? Are there any others CW oddities I should know about?