DRU-H-R Dynamic Reference Unit-Hybrid Replacement

High-Precision Pointing and Location System

EMCORE’s Dynamic Reference Unit-Hybrid Replacement (DRU-H-R) continues its record of excellence in providing mission-critical precision pointing and location to our warfighters. Partnered with the U.S. Army, EMCORE’s combat-proven precision product family delivers mission-critical information such as survey, pointing and position to our soldiers for precise, indirect mass fires and counter-fire operations.

The DRU-H-R has growth capacity to add an embedded Selective Availability Anti-Spoofing Module (SAASM) GPS with M-code capability. It can also be configured to function in unmanned, rotational and shipboard environments.

The DRU-H-R is an advanced precision navigation system that provides accurate vehicle position and attitude data. This unit replaced the DRU-H on Paladin and Firefinder, both playing critical roles in supporting U.S. ground forces in all phases of active combat operations. The EMCORE DRU-H-R design upgraded system performance by using high accuracy, combat-proven inertial sensors currently fielded on the Multiple Launch Rocket System (MLRS), High-Mobility Artillery Rocket System (HIMARS), and Improved Position and Azimuth Determining System (IPADS).

The DRU-H-R delivers precisely what the Army of tomorrow needs — a sustainable, affordable system designed to remain operationally effective well into the future.


  • High-performance RL34 ring laser gyros
  • Common architecture and components (MLRS, HIMARS, IPADS)
  • GPS-aided using customer-provided Defense Advanced GPS Receiver (DAGR) or optional embedded SAASM
  • Impervious to jamming (inertial mode)
  • Resistant to jamming (GPS-aided mode)/li>
  • Combat-proven heritage; fully qualified/U.S. Government tested
  • Embedded Built-In Test (BIT)
  • High reliability MTBF, low mean time to repair (MTTR)


  • Currently installed on Paladin (M109A6 and M109A7), Firefinder (AN/TPQ-36 and AN/TPQ-37) and Long-Range Air Surveillance Radar (AN/TPS-59)
  • Pointing and position information for soldiers
  • Direct and indirect fires, counter-fire and air-surveillance radar operations
  • Manned, unmanned, rotational platforms, wheeled and tracked vehicles, extreme gunfire shock, battlefield and shipboard