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    Navios < 20 m

    Type Power source Fundamental frequency, Hz IMO minimum required 1/3 rd octave band level at 1m, db IMO required 
    frequency, Hz
    KT(V) 75/400 Air-driven 400 120 250-700
    MLT 75/345 Electrically driven 
    345 120 250-700


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    Tyfon signalling, vessels less than 20m

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    From classic "honks" to complete acoustic systems A Kockum Sonics whistle is not only a high-quality design, it also contains the experience of more than 1 million TYFON® installations! Audibility is determined not simply by the strength of sound emanating from the whistle - much more is entailed to overcome absorption, distortion and local noise.

    Navios < 20 m

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