The L550-HHS/SRO lights combines the helicopter hoist light (HHS) and the Search and Rescue Operations light (SRO) in one fixture. A separate HHS or SRO IR light is also available. This light is optimized for use in Offshore  environments. The light for helicopter hoist operation is a green status light, which is flashing or steady burning to indicate the hoist status. The SRO is a steady burning red + infrared light to indicate target turbines in emergency cases. The lights incorporates the benefits of advanced LED, optical and system control technologies to meet the most demanding applications.

Orga Aviation – Datasheet Drawing – L550 SE – r00-01
Orga Aviation – Datasheet Drawing – L550 SE – r00-02
Orga Aviation – Datasheet Drawing – L550 SE – r00-03

Key features

  • Designed for optimal corrosion resistance in offshore environments due to usage of best-in-class aluminium with “Excellent Resistance to Corrosion” classification and offshore proven coating system
  • Optimised housing design minimizing the risk of coating damage during handling and installation
  • Stainless steel mounting feet eliminating galvanic corrosion between feet and structure
  • No maintenance required over service life.
  • Orga optical design produces highly accurate and uniform narrow light beam
  • Integrated design with build-in photocell and monitoring – no additional power supply enclosure needed.
  • Integrated GPS based flash synchronization between lights, UTC 0.0.0.
  • Low power consumption
  • 15 year field proven power supply technology
  • Made in the Netherlands


  • Certified to CAA-UK CAP 437; Offshore helicopter landing areas – Guidance on standards, Feb. 2023, Appendix J – Helicopter hoist light
  • Complies with Maritime Coastguard Agency – OREI SAR Requirements v3.0 Nov. 2021

Performance characteristics

  • Horizontal beam pattern: 360°
  • Steady and flashing mode available according to hoist operation
  • Effective intensity: According to CAP437 Helicopter hoist light, or Search and Rescue light
  • Vertical beam pattern: according to CAP437 Helicopter hoist light, or search and rescue light
  • Infra-Red wavelength ~850 nm
  • Infra-Red vertical beam pattern: according to MCA requirements

Electrical characteristics

  • Operating voltage: 120-240Vac nominal 50-60Hz
  • Power consumption: See table
  • Overvoltage protection: Class III according to IEC61643-1

Physical characteristics

  • Dimensions: L x W x H: see drawing
  • Weight: 16kg
  • Design degree of protection: IP65
  • Operating temperature range:
  • -40°C/+55°C
  • Shipping information: 550 x 550 x 400 mm; approx. 20kg
  • Supplied with pre-mounted Orga cable for easy installation and high reliability
  • Cable bending radius static: 10x cable diameter
  • Outer cable diameter: Ø12.5 +/- 0.5 mm
  • Cable weight: 260 g/m
  • Level indicators for correct mounting

System design, control and monitoring

  • Use with an Orga CIP controller