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The main fog flute generally has a hearing range greater than 2 nautical miles in any direction, and the secondary fog flute generally has a hearing range greater than 0.5 nautical miles in any direction
The installation position and structure should ensure that ships approaching the platform from any direction can hear it
The installation height should be above the average high tide surface, no less than 6 meters and no more than 30 meters
The main fog flute generally has a hearing range greater than 2 nautical miles in any direction, and the secondary fog flute generally has a hearing range greater than 0.5 nautical miles in any direction
When the main fog flute fails completely or partially, resulting in a general hearing range of less than 0.5 nautical miles in any direction, the secondary fog flute should be put into use immediately
The acoustic rhythm characteristics of the main fog flute and the secondary fog flute are the Morse signal "U" (... 1), with a maximum period of 30 seconds
| Rated voltage | DC18 - 36V | Sound characteristics | Morse U(as per IALA) |
| Rated power | 100W / 20 W | Ingress protection | IP66 |
| Audible range | Main foghorn≥2N Secondary Audible range foghorn0.5NM | Ex-proof mark | Exd IIC T6 Gb |
| Sound intensity | 134dB@1m | Weight | 175kg / 50kg |
| Frequency | 900Hz |
