Cybernetica AS Department of Navigation Systems

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LED Ice Buoy Lantern E8291

The ekta™ Ice Buoy Lanterns E8291 utilize modern LED technology to provide omnidirectional flashing light beam for use on marine buoys around the year. The lantern body is machined from marine grade aluminium to provide optimal structural rigidity and to withstand the pressure of the packed ice. LED based light sources are housed in cavities covered by acryllic or polycarbonate lens. The enclosure houses a built-in flasher, a GSM/GPRS communications controller, a GPS receiver, and a GSM/GPS antenna. The cable plugs are located on the lower side of the lantern. The E829 Ice Bouy Lights are currently available in two versions: E8291 with 16 LEDs external diametre of 520 mm and E8293 with 18 LEDs and the external diametre of 460 mm. The E829X lanterns are currently available in one of the three colours: red, green, white.

The night time visibility range of the lanterns depending on the colour and flashing mode is up to 6 nm. In case of shorter visibility range requirements, the solid state flasher driving the LED array can be programmed for lower power output using pulse width modulation (PWM).


  • Low profile and robust enclosure design to guarantee survival in ice and/or submerged conditions
  • A built-in solid state flasher for precision control of flashing in accordance with the pre-configured characteristics and  daylight dependent control of flashing (based the light sensor signal level)

  • A built-in GSM/GPRS communication controller with integrated GPS receiver for cost effective remote monitoring and control, GPS based synchronisation, and optional synthetic AIS signalling

  • Integrated solid state 3D acceleration sensor for optional buoy inclination and/or wave height monitoring

  • Four flexible bird deterrents

Picture of E8291  


Typical wavelength
or radiation temperature
625 nm 
505 nm
5500° K  
Typical light intensity at full power at 20°C, cd
Vertical divergence angle of the light signal 1/2
Vertical divergence angle of the light signal 1/10
Power supply voltage range 
From 10 VDC to 27 VDC
Power consumption of LED array 
11 W maximum in flash at full power
Enclosure material 
Machined marine grade aluminium
Enclusure surface finish
Deeply anodized to 100 μm and covered using a two component marine epoxy coating
Flash length (programmable)  
Any multiples of 10 ms up to 60.01 s
Period time (programmable) 
Any multiples of 20 ms up to 655.35 s
Ambient air temperature
From -30°C to +55°C (IEC/EN 60068-2-1, IEC/EN 60068-2-2);
from –20°C up to +45°C for the communication controller
Mechanical vibration
13.2 Hz to 2 kHz with acceleration up to 2.2g  (IEC/EN 60068-2-6)
Repeated mechanical shocks
Up to 10 g (IEC/EN 60068-2-27)
Weight, kg
38 kg (E8291); 28 kg (E8293)
Ingress protection class
IP 68 (IEC/EN 60945-8.9, IEC/EN 60529), capable of surviving weeks of forced submersion under fast ice


Side view of the E8291  
Bottom view of the E8291  
Figure 1. Side and bottom view (mounting dimensions) of the Ice Buoy Lantern E8291

CAUTION: LED light units are sources of bright light, do not stare directly into the beam from close distances and observe all the warnings and guidelines in the Instruction Manual. ektaTM E829X LED Ice Buoy Lanterns are classified as Class 3R LED devices with maximum optical power of 75mW (emitted wavelengths 400 to 700 nm) according to the standard IEC/EN 60825-1:1993+A1:1997+A2:2001.

If you need more information, including the information on prices and availability of our products, please do not hesitate to contact our marketing group. We may be able to offer product customization and design services to accommodate your unique requirements.

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© 2008 Cybernetica AS. Last updated 2008-04-02