Cloaked areas in Spintires

Cloaking area is a special area, which makes portion of the minimap invisible. When you drive close to the cloaking area center, the cloak is removed so you can use the minimap to navigate. Sometimes cloaking areas overlap each other and removing one doesn't reveal much of a map.

You are not required to remove cloaking areas to complete the game objective.

Black vortex as the center of cloaking area in Spintires