Armed cargo vessels have more in common with true warships than typical freighters, giving up a significant portion of their cargo capacity to mount warship-grade weapons and engineering plants. They move +4D6 when under All Ahead Full special orders as warships do.
They are worth one assault point in planetary assault scenarios when within 30 cm of the planet edge and count as a half-transport (rounding DOWN) in scenarios that require transports. This means that if it is the only one remaining in a convoy scenario, it counts as zero.
When included in a Rogue Trader escort squadron and not being used as a transport in scenarios that require them, it offers +1 Ld to Reload Ordnance for this squadron by ensuring escorts have a ready supply of torpedoes before the battle. This effect is not cumulative if there is more than one Armed cargo vessel in the escort squadron.
Options
Fast Clipper: Instead of taking a refit normally, for no extra cost this vessel type can be converted to a fast clipper by entirely removing its primary battery armament for the Advanced Drive Technology refit on pg. 185