Mars Entry Example MERS engine to standby planetary appr witch to inertial nay rotate to entry-orient hold attitude Switch navigation mode separate ander (Courtesy of Mitch Ingham. Used with permission.Mars Entry Example engine to standby planetary approach switch to separate lander inertial nav rotate to entry-orient & hold attitude Switch navigation mode: “Earth-relative” = Star Tracker + IMU Switch navigation mode: “Inertial” = IMU only (Courtesy of Mitch Ingham. Used with permission.)