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