Ventress launched an attack on the ship, in which several boarding ships penetrated the hull of the Tranquility. Several B2 super battle droids dismounted from the boarding ships and advanced toward the prison level, while the Dark Acolyte infiltrated the reactor room of the Tranquility. The Captain and a fellow trooper were patrolling the ship and arrived in the reactor room. They did not, however, notice Ventress, who was stealthily planting explosives on the reactors in order to cripple the ship. The Captain told 327-T,[2] a WED-15 Treadwelldroid inspecting the reactor room,[7] to watch for intruders, before locking down the room. He then contacted Clone CommanderCC-1004, stating that the reactor room was checked. The Commander told the two clones to head for the prison level, where the remaining super battle droids were fighting. Ventress was later able to escape with Gunray.[2]
When the Captain instructed the droid 327-T, whom he nicknamed "327," to keep watch in the reactor room of the Tranquility, his fellow trooper informed him that droids did not like to be called by their nicknames.[2]