No Documentation for Lighthouse 3 Navigation App Symbol

[Dan_Y]

In the Navigation App, I cannot determine what the blue pointer is between the Apparent and True wind directions in the screen capture below. It is not on the Sailing App, but probably should be if it's the current. The latest LH3 documentation does not really cover these really useful apps yet. Being on a broad reach, my heading and COG were nearly identical. It appears to be the direction that the current is acting on the boat, based on the second screen shot.
Thanks
Dan