ZÖLLNER Signal GmbH » Ship Industry » Inland Vessels

Inland Vessels

Ship class Sound intensity in 1/3rd-octave band level
at 1 m distance (dB)
Fundamental frequency (Hz)
Ship < 20 m 122  250-700
Ship > 20 m 132 130-350


The product line of suitable devices seagoing vessels is expanded with triple-tone-signal systems in order to fulfil the requirements for the Danube, suitable for zone 2.

Part of the delivery contents are signal automatons for the automatic repetition of the demanded sets of tones, a sound signal lamp, and a foot switch.

Type: ZETFON Fonomat 1x70s. ZETFON Fonomat 4x70s
Sound intensity: 124 dB 129-134 dB
Frequency: 310 Hz 310 Hz