Adding this is very important. I once flew a circuit, and onto finals, at an airport in Texas with CTAF; just after I made each call, the same call was made by another aircraft! When he called finals just after I did, and we could still not see each other, I went around. He was still nowhere to be found, and it was discovered that he was in the circuit at another airport miles away that happened to have the same runway; he had not been calling out the airport name
