The rocket’s steering goes wonky

Among many new changes, SpaceX will be testing a new electronic thrust vector control system for the booster’s Raptor engines. Vector control is a mechanism used in rockets to control the direction of the thrust, and hence the rocket’s flight path. The system does this by adjusting the angle of the rocket engines. Should the updated system fail, Starship could go off course, forcing ground controllers to engage the flight termination system.