A shell of asteroids envelopes the inner planets within Grace's system, including the planet Grace itself. The field is comprised of asteroids that contain a large percentage of electrum, which causes an electrical charge to fire between ore nodes as they pass within proximity of one another. The discharge from these deposits are unpredictable and dangerous to the average pilot. Only by collecting vast amounts of data can the Chorda Docking Authority chart the movements of these asteroids to the degree required to chart pathways for ships through the shell. Pirates and other unsavory types have developed their own methods to reduce the dangers within the belt, though they are unreliable at best.