Thanks very much. The sound you have attached is exactly the sound I couldn't work out. I have never noticed a ping associated with it.
They can be added,but is there any way to remove camera positions?The confusing thing if you don't have the map on the screen at the time is that people can add mobile camera positions so in which case you do not associate it with a camera if the van is not there.
You can add a camera position by pushing the camera icon on the map screen.