Explain the drifting radius circles

[BlackMoria]

Got the game and did a couple of scenarios the other night. I noticed something that I can't find in the manual PDF.

During one scenario, a series of radius circles appeared on the left side of the map and started drifting from left to right across the map. They for the most part were a white colored radius circle but occasionally they changed to a dashed line and then back to a solid line.

What the hell are they?

Can I disable them because without knowing their purpose, they are as annoying as hell?

[22sec]

Those are illumation flares that the AI is firing. The area inside the circle is illuminated.

[nikolas93TS]

They are drifting because wind can carry them. Wind is also an important factor when laying the smoke barrage.

[BlackMoria]

Thanks for the reply. Illumination Flares...cool. Now I know.

[zacklaws]

If you use the map detail hot keys, Ctl + F10 to lower the settings and Shift +F10 to increase the settings you will get rid of the rings and see the area illuminated itself when you are on the maximum setting.