Did you know you can use voice navigation in the Fly To screen? It will work with the devices speakers, Bluetooth, and the headphones.
To use push the Correction Entry Value on the Navigate Screen. You will get a sort "Voice Guidance ON," or "Voice Guidance OFF" message on your screen. When on an a difference between track and bearing occurs, you will be warned "Right (or Left) 005." These advisories will continue with a delay of 20 seconds between messages until the the Correction entry is pressed again.
Note that these advisories will continue when you move to the MAP screen.