The Astrotech Module, when used in conjunction with an Astrotech Computer, can create a basic but effective repair system. The Astrotech Module fires a repair beam in a straight line. Astrotech Modules do benefit from being grouped together (being adjacent to one another), increasing their repair speed. You can also choose which block outputs the beam by finding the Astrotech Module you want to output the beam, and pressing (R Default) on it. AstroTech Modules can used to repair damage to blocks.