These spacecraft were used to test Federation resolve during the Rihannsu incursion of 2266. This ship, painted with an impressive predatory bird on its underside, is equipped with a cloaking device and a powerful plasma energy weapon. Propulsion on early models was provided by a simple impulse drive by was soon updated with a warp drive system. This may have been the first known example of a ship equipped with a practical invisibility screen. The Rihannsu have continually upgraded these vessels, which still play an important part in the Rihannsu fleet, serving in various roles.