Electric light-signalling devices with semiconductor lamp ESPP-90 and ESPP-90M are intended for use as signal navigation lights, installed on shore and floating navigation signs (GOST 26600), used on inland shipping lanes to ensure safe passage conditions for ships and in the dark time of day.
Light-signalling devices are produced with a colourless Fresnel lens with a diameter of 90 mm, forming the required light flux. Attachment to the tank or buoy is carried out with the help of three studs, which also serve as protection for the device body. The lantern is powered from external sources. One set of 250 Ah power supply, for example, "Baken-VC" is enough for the whole navigation period. There are several modifications of the device, differing in colour and character of light glow.
Electric light-signalling semiconductor device of directional action ESPPP-140 is used as coastal navigation signs of navigable environment..
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