Phoenix Logs/Forerunner/Controller Sentinel

Forerunner system offensive/defensive drones

The Controller Sentinels’ primary function is to guard valuable Forerunner

technologies on the Ark. Developed and deployed to counter the escalating

threat from the UNSC and the Banished, these flying Sentinels are loosely

'tethered' within set radii of important sites and will attack anyone that comes

close, or attempts to take control of the sector.

An impenetrable energy shield protects the front of each Controller Sentinel, an

improvement on the already powerful shields used by the Enforcer Sentinels

whose function was to suppress Flood outbreaks. Underneath it fires a

continuous Sentinel Beam to prevent enemies from hiding in its blind spot, but

its primary weapon is a devastating supercharged Sentinel Pulse.