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    ZÖLLNER ZETFON 300/310 – Electronic Shiphorn with optional microphone unit

    €5.325,-* 0 pcs on stock; delivery within 3 weeks
    The ZÖLLNER ZETFON 300/310 – Electronic Shiphorn with optional microphone unit is type approved for marine use and produces a powerful horn signal in excess of 131 decibels for vessels up to 75 meters in length.... Show more
    2 variations microphone unit: No options

    Product description

    The ZÖLLNER ZETFON 300/310 – Electronic Horn with optional microphone unit is a type approved electronic ship horn and loud announcement system for marine use that produces a powerful horn signal in excess of 131 decibels for vessels up to 75 meters in length. The ZETFON 300/310 is a robust electrically operated whistle which is equally suitable for all types of inland and maritime navigation. 

    It also provides an optional microphone unit for communication between helm station and personnel on the exterior deck of the vessel. The ZETFON 300/310 consists of the following components:

    • ship horn unit
    • control unit
    • optional microphone unit

    Sound of the ship's horn


    Sample two is a video inside the sound laboratory:


    • decades of experience
    • best material and workmanship - made in Germany
    • with optional microphone attached to foghorn
    • optional body heating for cold areas available on request
    • control and amplifier unit provided with reverse polarity protection of supply voltage
    • low power consumption of 170 W
    • easy installation
      • only 4-core cable required for standard design
      • low weight
    • easy exchange of all parts with onboard tools
    • the whole system runs on 24V DC.

    Sound Characteristics

    • broad frequency spectrum with many higher harmonics
    • signals with strong overtones for best penetration of background noise level
      Even when a background noise covers the actual basic frequency the residual tone forms a base frequency in the human hearing. Two or three harmonics are sufficient for the hearing to perceive the basic frequency.
    • sound frequency of 310 Hz very advantageously ranks in the lower admissible range (250-700 Hz)


    • full compliance with the COLREGS 1972
    • type approved by all well known international authorities, certificates by the classification societies on request
    • usage
      • vessels of 20 m but less than 75 m in length
      • land alarm, i.e. bunker stations, oil refineries, airports, powerplants, factories
    • system voltage: 24V DC
    • entirely made of best non-corrosion, seawater resistant materials (no plastic)

    Technical Information

    • Ship length [m]: 20 - 75
    • Horn Method: Electronic
    • Voltage: 24 VDC
    • Cable gland [mm]: 7-13 / 9-17
    • max. fundamental frequency [Hz]: 310
    • Sound intensity in 1/3rd-octave band level at 1 m distance [dB]: 131
    • mind. IMO 1/3rd oct [dB]: 130
    • max input when sounding [W]: 300
    • Weight [kg]: 7+6,5
    • Ingress protection class [IPxx]: 56
    • Heated: body heating for cold areas available on request
    • Type approval BSH(DHI) no.: 4615/ 6021225/09


    This Zoellner ship horns for the High Seas and Inland shipping is built to the highest quality standards. It offers owners and captains a highly reliable means of meeting IMO/USCG tone signalling requirements and an aesthetically pleasing element on board with a distinctive sound that will be the envy of everyone. The audio signals are tested and certified against standards set by the International Maritime Organization (IMO) and the Collision Regulations (COLREG).

    The "Convention on the International Regulations for Preventing Collisions at Sea (COLREG, 1972 - Annex III) describes the technical details of sound signal appliances with respect to the sound signal intensity and the range of the audibility (see: COLREGS - International Regulations for Preventing Collisions at Sea; Annex Ill - Technical Details of Sound Signal Appliances; Chapter 1. Whistles (check IMO for latest version!)

    Ship length [m]: < 20

    • measured Frequencies [Hz]: 180 - 450, 450 - 800; 800 - 2100
    • Sound pressure @ 1m [dB(SPL)]: 120; 115; 111
    • Range [NM]: 0,5

    Ship length [m]: 20 - 75

    • measured Frequencies [Hz]: 250-700
    • Sound pressure @ 1m [dB(SPL)]: 130
    • Range [NM]: 1

    Ship length [m]: 75 - 200

    • measured Frequencies [Hz]: 130-350
    • Sound pressure @ 1m [dB(SPL)]: 138
    • Range [NM]: 1,5

    Ship length [m]: > 200

    • measured Frequencies [Hz]: 70-200
    • Sound pressure @ 1m [dB(SPL)]: 143
    • Range [NM]: 2

    Manufacturer information

    • Manufacturer: Zöllner Signal GmbH
    • Partnumber: 014150441 or 014151271 (with optional microphone unit) 


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