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VRS-3000 / 3010 / 4000 Vertical Reference Systems

Product overview

Engineered to outperform and outlast conventional spinning-mass vertical gyroscopes, the L3Harris family of vertical reference systems reduces costly mechanical repairs while providing superior reliability. With software that is qualified to DO-178B Level A, the VRS-3000, VRS-3010 and VRS-4000 are designed to drive primary and secondary flight displays, as well as flight controls (autopilot). And with their multiple output formats, they are compatible with both analog and solid-state attitude indicators.

  • Solid-state performance
  • More reliable operation than mechanical systems
  • Compatibility with manned and unmanned aircraft and watercraft

Key Features


Designed for 115 VAC platforms, the VRS-3000 replaces gyroscopes such as the SBU-23 and MD-1, utilizing solid-state rate and level sensor technology to provide accurate attitude and rate measurements. When paired with an Air Data Computer, the VRS-3000 is capable of providing attitude, altitude, airspeed, vertical speed and slip/skid information.



The VRS-3010 is designed to outperform the aging, old school SBU-23/MD1 gyros to meet the needs of today’s military pilots. With software that is qualified to DO-178B Level A, the VRS-3010 is designed to drive primary and secondary flight displays, as well as flight controls (autopilot).



In today’s increasingly sophisticated air and sea activities, it’s critical to have reliable reference information at your fingertips when you need it. Whether the application is a rotary- or fixed-wing aircraft, Unmanned Aircraft Systems or watercraft, the VRS-4000’s certification to RTCA DO-160D environmentals assures operators they can get the job done.


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Visit Technical Support Website

To gain access to the latest technical publications, service bulletins and other pertinent information about your recorders or other L3Harris devices, operators and authorized repair facilities need to register with our technical support organization for the online library.

Technical support:
Phone & AOG hotline: +1 (321) 674-4900

Technical publications:

Cage Code / Federal Supply Code: 25583

Facility / Shipping / Mailing address:
5353 52nd Street, S.E.
Grand Rapids, MI 49512-9704 USA

Order administration / Sales / General inquiries:
Phone: +1 (616) 949-6600

Repair and overhaul administration: 
Phone: +1 (321) 674-4900
Fax: +1 (616) 977-6895
For service repair (Part 145) returned material authorizations (RMA): Visit RMA website

Data services: