370196 AIR HORN FOR HULL L MORE THAN, 200MTR 128HZ 143DB AC220V

Required installation under the international regulations for preventing collisions at sea. The frequency of the horns shall be between 130 – 350 Hz for a vessel greater than 75 mtrs but less than 200 mtrs in length, and 70 – 200 Hz for a vessel 200 mtrs or more in length.