http//www.quantec-signals.com/en/offshore/aviation/sar-search-and-rescue/

Quantec Signals: Offshore aviation light systems

The SAR fire warns with red light if abseiling onto a wind turbine platform is not safe. 

SAR – »Search and rescue« – stands internationally for the need for action and tools that support the identification and rescue of people in dangerous situations or environments.

The SAR fire from Quantec Signals is used as a warning light on the top platforms of wind turbines. A red 200 cd light signal informs the helicopter pilots if it is not safe to abseil people onto the platform.