Explosion proof foghorn, designed to provide 2 nautical miles omni-directional coverage. For man-made offshore structures and in line with IALA regulatory requirements. Can be supplied as a combined main/secondary (2/½ Nm) foghorn together with duplicated controls in the Navaid Central Control Panel (NCCP).


Key features

  • Reliable marine foghorn, low cost of ownership
  • Suitable for Zone 1 and Zone 2 areas with gas explosion hazard; ATEX & IECEx certified
  • Operating voltage and code control provided from Navaid Central Control Panel (NCCP)
  • Monitoring system integrated in Navaid Central Control Panel (NCCP)
  • Offshore coated seawater resistant light alloy body
  • Can be supplied as a main/secondary(2/½Nm)  foghorn together with duplicated controls in the Navaid Central Control Panel (NCCP)
  • Optional EX e connection box

Performance characteristics

  • Morse code ‘U’ every 30 seconds from Navaid Central Control Panel (NCCP)
  • Alternative codes available; e.g. USCG: 2 seconds blast every 20 seconds
  • Alternative codes available; USCG 2 sec blast every 20 seconds (2 sec sound, 18 sec silence)
  • Usual range main foghorn: 2.0NM (134dB(A) at 1 m)
  • Horizontal sound output: 360°


  • Complies with IALA regulation; O-139 The marking of man-made offshore structures – September 2020; chapter 2, paragraph 2.1.2 – fog signal
  • Complies with IALA guideline; G1162; The marking of man-made offshore structures – December 2021, chapter 2.1.2 – hazard warning signals (HWS)
  • Complies with UK Department of Energy and Climate Change; Standard marking schedule for offshore installations – April 2011; chapter 4 – secondary fog signal
  • Complies with Mining regulations of the Netherlands – January 2022, Article 5.2 – Fogsignal
  • Complies with US Coast Guard; 33 C.F.R. Part 67 – Aids to navigation on artificial islands and fixed structures
  • Cenelec EN 60079-0, EN 60079-1 and EN 60079-7
  • KEMA 02ATEX2269 (foghorn); ATEX II 2G Ex eb llC T6 Gb
  • KEMA 02ATEX2103 X (junction box); ATEX II 2G Ex db llB T6 Gb
  • IEC 60079-0, IEC 60079-1 and IEC 60079-7
  • IECEx DEK 11.0105 (foghorn); Ex eb IIC T6 Gb;
  • IECEx KEM 09.0089X (junction box); Ex db IIB T6 Gb (optional Ex db eb)
  • ABNT NBR IEC 60079-0, ABNT NBR IEC 60079-1 and ABNT NBR IEC 60079-7 (optional)
  • Inmetro NCC 13.1778 (foghorn) (optional)
  • Inmetro NCC 22.0085 X (junction box) (optional)

Electrical characteristics

  • Operating voltage: 190Vac; 860Hz from Navaid Central Control Panel (NCCP)
  • Power consumption:  80 W peak max (Digital modular NCCP)
  • Connection details: max. 4 mm²; one M25x1.5 cable gland entry
  • Earth connection: internal 4 mm²and external M6

Physical characteristics

  • Dimensions (L x W x H):
    678 x 464 x 1900 mm
  • Weight: 175 kg; lifting eye suitable for lifting 700 kg
  • Degree of protection: IP66
  • Operating temperature range:
    –55°C to +55°C

System design, control and monitoring

  • Control and monitoring via separate control panel (see separate product information sheet)