The Spiral-class Assault Ship is a single-use, small unit boarding craft designed for the rapid insertion of special forces into non-military vessels or space stations. The ship is equipped with no ranged weapons at all, instead relying on stealth technology to keep targets from spotting it until it is too late. When the Spiral hits the target's particle shielding, the shaped proton charge detonates, disrupting the shields for fraction of a second - long enough for the Spiral to burn through and bury itself into the target's side.