History of Patrol Thresher

The Patrol Thresher is an Imperium enemy in the Out In The Cold mission of Renegades, set on Europa. Once the Guardian has placed all three sensor beacons to locate the hidden Imperium base, a Patrol Thresher attacks. It moves to a new location each time part of its health is depleted, and it can be destroyed once its final health bar is gone.

Defeating the Thresher advances the mission: the Guardian then goes to the marked location, which reveals the base's entrance. The Thresher is one of the base's anti-air defenses, so destroying it also removes a threat to the shuttle the team needs to steal.