Octantis Inertial Navigation Systems are tactical grade GNSS aided MEMS based Inertial Navigation Systems (INS-GPS), for precise position, attitude and orientation information. Octantis is a MIL spec NAV system integrated with multi-constellation GNSS. The system runs a multi-mode Kalman filter making it suitable for high and low dynamic applications. In addition, it makes use of vibration suppressing high quality (1 deg/hr.) gyros. This system is very compact and space efficient.