Digital horn ETD 100/350

for ships 20-75 m

Many who sail under the IMO Regulations COLREG 1972 know that these rules request very high sound pressure levels for efficient signalling, yet '.'.. the sound pressure level of the vessel's own signal at the listening posts shall not exceed 110 dBA and so far as practicable should not exceed 100 dBA" (extract from IMO Regulations). The rules are demanding a strong signal on board but without noise! A common way to solve this 'Paradox' of COLREG 1972 is to place a whistle very high above deck. But what if even the highest point is not high enough? AWhistle with Unsymmetrical Sound Distribution is the solution!!! The novelties in brief with the horn design are: • Concentration of the total sound radiation towards the plane where it is needed-the horizontal plane. This means up to 10 dBA lower sound radiation downwards (and upwards). • Appropriate sound spread in all horizontal directions with the strength related to the headline sound pressure level as prescribed by IMO.