The VN-100 is well suited for underwater vehicle applications where precise heading, pitch and roll measurements are required. Each VN-100 is individually calibrated at room temperature and over the full operating temperature range of the sensor to correct for sensor bias, misalignment and scale factor errors. The VN-100 utilizes a robust quaternion based attitude estimation algorithm which enables the sensor to operate in any orientation free from problems associated with gimbal lock. The VN-100 is the only AHRS in its class to offer onboard hard & soft iron calibration capabilities. This feature makes it possible to compensate for magnetic distortion created from nearby electric motors and batteries while the device is in the field, eliminating the need to perform costly field testing.