About 25 years ago I was flying regularly with British Airways and they suddenly changed from using one of the stewardesses to make the safety announcement to using a recording. So if you were on a long trip, you heard it several times as planes had to touch down more frequently than they do now in order to refuel.
The voice they used then was that of Hannah Gordon, and as I was desperately in love with her (and Mrs Gerald knows this, so no chance of blackmail there

) I would stop reading and always listened to her voice with a great silly smile on my face

. Needless to say I knew the words of the safety drill to a perfection.
So my answer would be that if I were to have a Satnav then it would have to be her voice to make sure that I followed the directions.