What does the random "ding" in Google Maps Navigation signify? Ever since updating my Nexus S to ICS, I've noticed that when using Navigation I sometimes hear a random "ding" when driving around.

Any idea what this means? I was thinking maybe it was a warning about the speed limit or something, but I haven't noticed any particular circumstances whenever it does it. Sometimes its multiple times per journey, other times not at all.

In the UK, Nexus S 4.0.3.
It sounds like you might be getting the "ding" noise discussed on this Google groups post:


  Thanks for the question. The alert chime you here indicates is a
  prompt for an upcoming driving maneuver. It plays in places where the
  Text-to-Speech engine is either unsupported or unavailable, but it
  also may play if the data connection becomes flaky during guidance and
  Navigation isn't able to process a road name in time.