Not to be confused with Deep Space Maneuvers
Trajectory correction maneuvers, also known as TCMs, are maneuvers done to adjust the trajectory or orbit of a spacecraft. They are conducted arbitrarily throughout the mission. Most commonly, they are performed before or after departures, arrivals or gravity assists.
Purpose[]
Trajectory correction maneuvers are important for precision adjusting the path of a rocket. For example, during the cruise phase of a mission, a spacecraft may perform a TCM to adjust its trajectory towards the atmosphere of said object in order to perform an aerobraking maneuver. A spacecraft can also perform a TCM to target a separate body or use one to rendezvous and/or capture into its orbit.