Vanguard FTS 370D Medium Intensity Obsruction System

Dual L-864 / L-865 Obstruction Lighting System

Vanguard FTS 370D Medium Intensity Obsruction System

The Vanguard Medium FTS 370d is a dual FAA L-864/L-865 medium intensity LED lighting system for structures between 200’ and 700’ AGL (FAA E-type towers).

The system also meets FAA L-885 low intensity catenary requirements. It complies with CAR 621 2nd edition for medium intensity CL-864/CL-865 flashing lights and ICAO 6th edition standards for medium intensity type A/type B obstacle lights.

The FTS 370d uses a single cable for communications as well as beacon and marker power. Firmware can be upgraded for future compatibility with no need for controller modification. The single enclosure houses a low-voltage environment, removing the need for an interlock switch and allowing alarms to remain active when the door is open.


  • Infrared (IR) lighting – NVG and NVIS compatibility using 850nm IR LEDs on the flash head per FAA AC 150/5345-43J
  • Interleaved LEDs and by-pass circuitry provide longer life by allowing the loss of individual LEDs up to the 25% limit
  • Surge immunity of 25kA to withstand 99% of all lighting strikes
  • LTE modem for improved communication stability
  • Ruggedized photodiode in metal housing with shielded cable
  • Input power breaker switch eliminates replaceable fuses
  • Outdoor Wi-Fi antenna for onsite diagnostics and lighting inspections
  • Patented Fresnel optics to minimize ground scatter
  • Aircraft Detection Lighting Systems (ADLS) interface
  • Automatic failsafe switches to day mode if no mode change detected
  • 4-line OLED backlit display for visibility in any lighting conditions
  • Dry contact monitoring (day, night, marker, PED, GPS, comm alarms and mode status)
  • Configurable to meet AC 70/7460-1L
  • 5-year warranty


  • Infrared LEDs on L-810 marker lights
  • SMART Card – monitor and control the system remotely and receive full diagnostic information through LTE modem or ethernet-based connectivity. SNMP, Modbus or Eagle Protocols can be used.
  • GPS synchronization
  • Upgrade firmware remotely
  • TECK90 Support – provides protection from RF interference and damage on high-power broadcast towers up to 700′ AGL

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