X3 Albion Prelude: ATF Valhalla Hauler (M2/M0)
In the literature, the Valhalla is classified as an M0 Battleship, but as there is no actual M0 classification in X3, it appears in-game as an M2 Destroyer.
This behemoth is canonically the flagship of the ATF, boasting large weapon arrays, spacious hangars and massive shields. It is also one of the largest craft in the game, being too wide to fit through gates.
In X3AP it has to be boarded, cannot be purchased.
http://roguey.co.uk/x3ap/ships/ship-205/