The Tau Navy's Il'porrui (Emissary)-class starship is designed for the transport of Tau dignitaries like Ethereals, Fire Caste commanders, and Water Caste diplomats, and not as a true warship. However, it is armed well enough to protect itself, with Gravitic Launchers, Railgun batteries, and a pair of launch bays. It is further protected by a deflector that enhances the effectiveness of its front armour. Il'porrui-class starships are becoming increasingly common within the Tau Empire, roving far and wide on diplomatic missions and as merchant vessels.
- Imperial Armour Volume Three - The Taros Campaign