Abh mod/Hangar Control Roof
The Hangar Control Roof parts were introduced in 0.5.3RC3.5 (formerly 0.5.1). Originally meant to be added when fighter support is added to Cosmoteer its release was moved forward due to demand. They are meant to offer a roof over hangar parts.
Each hangar control roof part offers different roof sizes (see name). Their roof covers the first quadrant or second quadrant with a set size. Note plane arrows in blueprint mode for direction. In order to cover hangars a combination of these have to be placed strategically.
Place them at the corners and edges of the hangar area.