Mars Entry Example MERS engine to standby lanetary approach switch to inertial nay rotate to entry-orient hold attitude Rotate spacecraft: separate ander once entry orientation achieved ACs holds attitude (Courtesy of Mitch Ingham. Used with permission.Mars Entry Example engine to standby Rotate spacecraft: • once entry orientation achieved, ACS holds attitude planetary approach separate lander switch to inertial nav rotate to entry-orient & hold attitude (Courtesy of Mitch Ingham. Used with permission.)