NavTutor
NavTutor was created to provide an interactive way to visualize and understand aircraft position in relation to VOR/NDB navigation aids. You can adjust the position of the aircraft by dragging your finger on it in the Map window. Change the aircraft heading by moving the Directional Gyro with your finger. You can rotate the setting by either moving your finger around the inside of the gauge or by using the two finger rotate gesture on the gauge. Change holds by selecting the desired hold (Standard or Right) and then selecting the radial/bearing with the slider.

Thanks to Claire Buxton, Melissa Wilson, Nicole Wilson and Lynne Zucker for encouragement, suggestions, support and advice.