Not sure when these ships started showing up, but I ran into my first one today. They're way more durable than the D'derix Battleships, but not quite as powerful offensively. They don't seem to have a tractor beam or photontic shockwave, but they do have the heavy plasma torpedo volley and plasma mines, so getting too close is still bad. The worst thing about them is Hazard Emitters. Science officers have subnuke, but anyone else it's a major battle of attrition.