Dreadnought Septima was a Time Lord battleship. It was commissioned early in the Last Great Time War and built in the Quantum Yards for the "assault on Seriphia".
After the Time Lords were threatened by the Sicari, Septima became used in Project Fury.
Fleeing from Gallifrey, Romana II and Narvin landed their TARDIS on Septima. (AUDIO: Hostiles)