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Zetfon 300/310


  • Frequency: 310 Hz
  • Intensity in 1/3 octave band level @ 1m: 130 db(A)
  • Intensity @ 1m: 131 db(A)
  • Ship Class: III
  • Power Source: Electric
  • Audibility Range: 1 NM
  • System Voltage: 24 V DC
  • Material: Corrosion and seawater resistant
  • Dimensions (L X W): 420 x 380 mm
  • Weight: Horn, 7 kg; control box, 6.5 kg


  • Optional public address capability with microphone attached to horn
  • Economic alternative to air horns on small vessels without air compressor
  • Compact design. Includes controller and amplifier unit
  • Easy installation
  • Full compliance with Colregs 1972 Annex III, IMO, and USCG regulations
  • Approved by all well known international authorities and classification societies
  • AC/DC converter available




The ZETFON comprises an electronic sound transmitter mounted on the mast and a control/amplifier unit for wheelhouse installation. The control/amplifier unit contains all electronic components including the heavy transformer. As a result, a heavy weight on the mast is avoided and vital components are within easy reach and not exposed to the elements.  The ZETFON is an economic alternative to air whistles on small vessels without an air compressor.

Zöllner offers complete ship set solutions: Horns, bells, gongs, maneuver lamps, sound reception devices, signal controllers, and inclinometers.


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