Hack Turret lets you reprogram an enemy turret to become a friendly turret, owned by you. Approach the enemy turret from behind to improve your chances of hacking it.
As with all "hacking" abilities, the speed at which the process is executed is relative to the player's proximity to the objective. When hacking a turret, the time is relatively quick, needing only a few seconds. Note that if an operative hacks more than one turret, the previous one will be destroyed. Therefore an operative can only own a maximum of one turret.