WithiVRU-FC-C167averticalreferenceunitisprovidedforapplicationswhichrequirehighaccuracyandsimpleusing.iVRU-FCisatriaxialsystemwiththreeorthogonalmountedruggedfiberopticgyroscopes,threeultraruggedisedMEMSaccelerometersandanintegratedpowerfulmicro-processorwith16bitsensordatadigitalisationtoprovidedigitaldatatransmission(CAN,RS232)andextendedinternalerrormodelling.Asanoptionalsoanalogoutputdatacanbeprovided.