When I listen to IAH ATC I always hear "Continental 1 descending out of 17 for 12." Then the ATC says "Roger Continental 1 Heavy." I hear this a lot. Why does the pilot not always say that he is a "heavy?" Thanks!
I hope I'm not wrong, but I think as already mentioned, in the U.S. it should be used with every call, in Canada only with the first call (every freq.) and in Europe only with the first call on the approach freq.