Annihilation Barge
The Annihilation Barge is, essentially, a massive gun mounted on a hover platform and are favoured anti-infantry killers. Usually found in the lower levels of a Tomb World, anyone who SOMEHOW managed to avoid hungry, hungry Scarabs, massive Spyders, ghastly Wraiths or even the Necrons themselves will more than likely be facing the receiving end of the Tesla Destructors; an eldritch discharge later and you'd be turned to dust...
Using the same Quantum Shielding panels as the Doomsday Arks, Ghost Arks etc, they are extremely durable, and are able to keep up with the ponderously advancing Necron army. Equipped with a (Twin-Linked) Tesla Destructor, they utilize the same 'Tesla' lightning as the Carbines and Cannons which can cause havoc amoung infantry as their flesh is roasted and their blood boils (In the game, every roll To Hit of a 6 adds two addition hits); it can also devastate most, if not all, but the most heavily armoured vehicles such as Landraiders or Monoliths. Unlike the Carbines and Cannons, however, the Tesla Destructor as a chance to 'Arc' off different units (again in the game, this only works when you're within 6", which in that case you roll a 6, followed by a D6 and it doesn't discern friend or foe). Also equipped are underslung Gauss or Tesla Cannons. Canny Overlords and Nemesors often put a squad or two of Warriors or Immortals as backup; they receive the increase in firepower while the Barge benefits from the extra bodies protecting while it blasts away at everything.
According to the fluff, these are heavily used against the Orks of Charadon.