Since the founding of the company ZÖLLNER, sound signal systems for vessels have been an essential pillar for the firm. All devices – ZÖLLNER ZET-Horn, ZÖLLNER Makrofon, ZÖLLNER ZETFON and accessories – are built with the newest technical standards and are approved in accordance with the international regulations of SOLAS, COLREG 1972 and EU norms.
Based on the COLREG 1972, Annex III, the following compressed air operated horns belong to the product contents for all ship classes:
|ship class||ship length (m)||sound intensity in 1/3rd-
octave band level
at 1 m distance (dB)
|Fundamental frequency (Hz)||Range(SM)|
|I||200 and more||143||70-200||2|
|II||75 but under 200||138||130-350||1,5|
|III||20 but under 75||130||250-700||1|
|IV||under 20||120|| 180-450
All listed devices– ZET-Horn, Makrofon, ZETFON and accessories – are designed for installation on seagoing and inland vessels and also find wide application as warning and alarm devices in industry and harbour areas, for catastrophe alert as well as on offshore platforms.
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