Temporal signature

During the Last Great Time War, the Time Lords dispatched technical teams to look for ways to block the temporal signatures of all operational TT capsules in order to prevent the Daleks from tracking them. (PROSE: Dalek Combat Training Manual)

Behind the scenes

 * James Johnson's "headcanon" for his Time War-era Reconnaissance Dalek, which was featured on the cover of Gallifrey: War Room 1: Allegiance, established that its Deflector Globes shielded the temporal signature of a Dalek from most Time Lord scanning technology, allowing them to work behind enemy lines undetected.