Any path with the following applied to it. Add attribute Bearing to contain the value. I'll see if I can mock up a more complete sample if you can't reproduce.
<Path.RenderTransform>
<TransformGroup>
<RotateTransform CenterX="0.5" CenterY="0.5" Angle="{Binding Attributes[Bearing], FallbackValue=0.0}" />
</TransformGroup>
</Path.RenderTransform>