The term 'Spook' refers to a type of electronic warfare craft, usually a Heavy Raider, that is primarily designed to trick DRADIS into thinking it is a Baseship or other capital ship in an attempt to draw fire away from the real vessels. During the Battle above Scorpia the Cylons deployed three of these vessels in an attempt to trick the Battlestar Hermes into thinking there were six Baseships attacking instead of three. The Raptors from the Hermes saw through the trick however by using their peripheral scanners that revealed the deception.