Ramming drone

The ramming drone was a type of starship operated by the in the 2250s of the  created by the temporal displacement of the Narada. Ramming drones were equipped with shields, but had no offensive systems despite being attack vessels, they instead used suicide attacks to damage enemy vessels. Ramming drones, and their larger counterparts, demolition drones, made up part of the Romulan force that battled starships of the in the 2250s. 

Background

 * The ramming drone, along with the demolition drone and space pirate, only appears in the "survival mode" of D-A-C and are is available as a playable ship.