Estimated reading time 1 minute, 14 seconds. The U.S. Department of State awarded a competitive selection to RMCI, Inc. to acquire their advanced technology for helicopter health and usage monitoring systems, or HUMS. The Expandable Rotorcraft Diagnostic System or XRDS is RMCI's next-generation HUMS. It is a locally developed leading edge technology that ensures a high quality of safety and improved aircraft availability.