“Houston Approach, this is twin-Cessna 6642 Charlie with you at 15 thousand.” “Good morning, 6642 Charlie, descend and maintain niner-thousand, expect ILS approach runway 13.” I received all of my flight training at an uncontrolled airport (no control tower), using only Unicom, 122.8, to announce my intentions – “Turning base to final.” Becoming proficient on the radio, however, at a crowded airport took some time, but my hours spent working as a flight instructor at a busy controlled-field airport in Chicago had helped facilitate that skill. Like now. I know Houston approach is listening for a response. “Roger, 42 Charlie down to niner ...