HRS
Horizon Reference System


HRS - Horizon Reference System - Navy

  • High precision stabilized lighting bar to indicate the true horizon
  • Two reference side lights containing LED matrix panels
  • Independent on board motion reference units
  • Made of massive milled aluminum blocks
  • Shock proof and IP 66 certified
  • Multisensor self-controlled status monitoring

The Horizon Reference System comprises the Horizon Reference Bar and two Horizon Reference Side Lights:

Horizon Reference Bar (HRB)

The Horizon Reference Bar (HRB) is the central component of the Horizontal Reference System (HRS), which consists of the HRB and two fixed Structure Reference Lights (SRL). The HRB is stabilized to a < 0.5° reference to the true horizon by an internal motion sensor (Inertial Measurement Unit IMU) and a powerful servo actuator. It can follow the vessels roll motion up to +- 30°.

The standard HRB light color is green to ensure compatibility with NVG mode acc. to STANAG 1445. Other colors are available on request incl. multicolor LEDs. The rigid design in full body seawater resistant aluminum is optimized for performance in extreme marine environments.
System integrity and operational reliability is controlled by Optonaval´s internal electronics combining multiple sensors measuring temperature, humidity and electric current, providing 24/7 monitoring of the HRB´s status. In that respect, the HRB will show an upcoming malfunction before it actually fails. Easily exchangeable standard dry agent cartridges provide effective absorption of residual humidity. Nitrogen filling -as alternative mode of humidity control- is available as optional feature.

Horizon Reference Side Light (HRSL)

The twin Horizon Reference Side Lights (HRSL) are the peripheral components of the Horizontal Reference System (HRS) alongside the Horizon Reference Bar (HRB). They mark the zero degree / heeling line. The universal flat signal light is based on an RGB LED matrix panel that can be customized in color and displayed array / symbol. The standard HRS light color is green to ensure compatibility with NVG mode acc. to STANAG 1445. A radiation screen provides excellent visibility in direct sunlight conditions. The rigid design in massive, seawater resistant aluminum is optimized for performance in extreme marine environments.

System integrity and operational reliability is controlled by Optonaval´s internal electronics combining multiple sensors measuring temperature, humidity and electric current, providing 24/7 monitoring of the HRS´s status. In that respect, the HRS will show an upcoming malfunction before it actually fails.