757 flap indicator
Hello been on the type for a few months now, and noticing a few interesting things(to me). One of which is the white arc inside the flap indicator around each flap position. The Arc spans on what it seems like 3 different widths, but not in a linear way. Up,1,5 looks the same and 15,20,25 same, but the arc on 30 looks similar to the first 3. Systems Manual states the Flap Disagree and Asym should indicate the relative positions of either flap when the hydraulic power is cut. I don't quite understand the reason for the white arcs to be there and their function. If anyone has insight over this, I would greatly appreciate the knowledge.
Regards,
Flap Indicator Pic