Official rule text
95.1 The ship can pick up and transport fighters and ground forces a unit upgrade technology of the same unit type as a unit when it moves. During a tactical action, it can pick up and upgrade technology they already have, the previous upgrade transport units from the active system, the system it started its is removed, and they must use the same Valefar Assimilator movement in, and each system it moves through. token that was used to copy the previous upgrade. a These transported units remain with the transporting ship 97.2 Players place unit upgrades they gain faceup on their faction until it is finished moving. sheets, covering the unit that shares a name with that upgrade card. b Units being transported by a ship that is removed from the board by a gravity rift are also removed from the board. 97.3 The white arrows next to an attribute on a faction sheet indicate that the attribute will improve when the unit is upgraded.