The DHR70N Polar

The DHR70N Polar

Ice free navigation lights at all times

Den Haan Rotterdam (DHR) introduces the DHR70N Polar at Europort 2015. The navigation light has a build-in anti-icing solution designed for Arctic environments. At extreme operating temperatures of down to -52 °C, ice formation belongs to the past.

The DHR70N Polar is based on a conventional fixture. But why does it need an anti-icing solution when a bulb produces more than 50Watts of heat? First of all, to anticipate on the IMO’s Polar Code, which states high demands on vessels and equipment operating in the arctic regions. Second of all, the navigation lights must remain free of ice when the light is switched off, even at temperatures well below -52°C. Take for example the red flashing stern light, used by icebreakers in this region, to indicate an icebreaker is stuck and/or backing up. In case this light needs to be used, it must be visible instantly. Presence of ice attached to the surface of the lens will make the lights invisible for other vessels nearby and a disaster is waiting to happen.

More than two years ago, DHR started researching on anti-icing solutions for navigation lights using LED-technology. Since this type of light does not emit sufficient heat, ice-accumulation at subzero temperatures can be the result. To safeguard the visibility of the LED navigation lights, an anti-icing solution is highly desirable in order to guarantee safe boating in Arctic conditions.

During the research process, DHR was approached for a series of new build LNG tankers used around the North Pole. However the vessels’ owner wanted an anti-icing solution for conventional navigation lights. From that moment in 2014, DHR started to implement this system in the existing DHR70N navigation light and the Polar was born. Again, DHR is proud to provide safety at sea in all weather conditions.