Survey Ship
Behavioural and Military Survey Ship, or simply survey ship, was a classification of Dalek saucer and a type of scientific survey vessel.
A contingent of Daleks - in Survey Ships Sigma, Delta and Epsilon - were sent on a mission through human history to learn how humans fought war were caught in a Vortex storm and were stranded in 1908, with Ship Delta being destroyed. Still proceeding with their plan, they were foiled by the Eleventh Doctor and the combined armies of the First World War in 1917 and Ship Sigma was sent crashing to the ground. One hundred years later, some archaeologists discovered the saucer underground and accidentally powered it back up. The Eleventh Doctor arrived just in time and connected the ship to a power line, overloading the reviving Daleks and their ship. (COMIC: The Dalek Project)
