|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|