A ship for promethium harvesting and science production. The storage facility is based on the infinitely tiling sample from https://www.reddit.com/user/DjinnKahn/ (thanks), with a storage capacity of 238,000 asteroids. Missile turrets are excluded: small asteroids are destroyed by lasers, medium ones by machine guns, and large and enormous ones by railguns. Ammo production rate is 18 per second, and railgun shells are 5.57 per second.