IMT SigMare NavAid Products

In line with current IALA international standards IMT offers a range of European ATEX certificated products to provide a safe and reliable warning system to marine vessels identifying all obstacles and traffic routes.

The IMT range of Nav Aid engineered lighting solutions incorporate the latest ILED technologies, are sealed units and designed for a worklife up to 100,000 hours. Every IMT system is manufactured from the latest corrosion resistant marine grade material available. The sustainable long life system reduces the need for costly continual repairs and replacement and provides a significant cost saving over the life of the installation.

The IMT range of Nav Aid ‘Zone 1 Ex-Hazardous Area’ certificated products includes:

  • ILED Dorado Marine Light (Main) 15NM
  • ILED Dorado Marine Light U-code (Secondary) 10NM
  • Foghorn Bank NV-4 (2NM + 0.5NM Secondary)
  • Visibility Fog Detector (in one bank)

IMT’s Nav Aid System can also be configured to operate from one central control panel for maximum efficiency. The system has an integrated 96 hour battery back up in the event of power failure.

The system can also be engineered to be powered utilising the latest available stand alone wind and solar technology.

ILED Dorado Marine Lantern

The ILED Dorado is hermetically sealed, so as to ensure that environmental conditions do not affect the functionality of the light.




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ILED Lyra Marine Lantern

The ILED Lyra is used as a subsidiary marine obstruction light as required by IALA’s O-139 and DECC (UK Department of Energy and Climate Change) regulations, amongst others. Both IALA and DECC regulations require the use of subsidiary lights to mark the extremities of (fixed) obstructions at sea that could pose a threat to navigation. To that end the Lyra is used as an addition to the


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Foghorn 2 NV-V3

This durable, low maintenance foghorn, is suitable for Zone 1 and 2. An efficient design using special amplifiers only require 3 stacked emitter to achieve the range of 2 NM. At the base of the horn the oscillator and termination panel is positioned, to provide an optimal sonorous output.




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Foghorn 2+0.5 NV-V4

This durable, low maintenance foghorn, is suitable for installation in a Zone 1 hazardous Area. An efficient design using special amplifiers only require 3 stacked emitter to achieve the range of 2 NM.




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Safe Area Visibility-Fog Detector

Measures atmospheric visibility (meteorological optical range) by determining the amount of light scattered by particles (smoke, dust, haze, exhaust fumes) in the air that pass through the optical sample volume. A 42° forward scatter angle is used to ensure performance over a wide range of particle sizes. MOR is calculated by converting the received signal strength (extinction coefficient, σ) using Koschmeider’s formula, MOR (Km) = 3/σ.




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Ex Visibility - Fog Detector

Measures atmospheric visibility (meteorological optical range) by determining the amount of light scattered by particles (smoke, dust, haze, fog, rain, & snow) in the air that passes through the sample volume. A 42° forward scatter angle is used to ensure performance over a wide range of particle sizes. MOR is calculated by the user by converting the received signal strength


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Safe Area Fog Detector

The visibility detector will be installed on the railing on a side of the deck. It measures atmospheric visibility (meteorological optical range) by determining the amount of light scattered by particles (smoke, dust, haze, fog, rain, & snow) in the air that passes through the sample volume.




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Photo Cell/Sun Switch

The sun switch/photo cell measures the illumination level (lux) and when this reaches a pre-set value it will activate or deactivate the lighting fixture(s).




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Safe Area Battery Sets

IMT works with batteries from reputable manufactures, specifically chosen for their durability and low maintenance operation.




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Ni-Cad and Lead Acid Battery Packs

IMT works with batteries from reputable manufactures, specifically chosen for their durability and low maintenance operation.




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Battery Circuit Breaker

Isolator switches can be used to manually isolate batteries, photovoltaic panels, wind turbines and/or other power sources. Unit can be locked in Isolated position.




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Lead Acid Battery Charger

IMT works with battery chargers from reputable manufactures, specifically chosen for their durability and low maintenance operation.




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