About Kahlenberg UK

Kahlenberg UK Ltd is the European distributor for Kahlenberg Industries, Inc. providing full European support and local stock for Kahlenberg marine and industrial air horns, sound signals, controllers, air compressors and the company's other products.

Please contact us for further assistance at or on +44 (0)1635 35353

Sound signal legal requirements

IMO COLREGs bookWhile countries across Europe will have local laws that apply to ship and boat navigation, there is a common requirement worldwide for all leisure, commercial and military vessels to conform to the IMO International Regulations for Preventing Collisions at Sea. As Steve Austin, Senior Policy Lead at the UK Maritime & Coastguard Agency (MCA) explains: "The COLREGs apply to all vessels, there is no differentiation between coded and non-coded vessels. Should the whistles prove not to conform then they will need to be modified or changed."

"Whistles should conform to the performance in COLREGs, Appendix III and the appropriate parts of IEC 60945 to EN60945 which deal with the marine operating environment."

All Kahlenberg products meet or exceed these requirements. Many other new and currently installed sound signals are non-compliant and might be breaching maritime law and invalidating insurance cover.

Kahlenberg onboard the USS George HW Bush


American supercarrier the USS George HW Bush CVN-77The US Navy’s latest supercarrier, the USS George HW Bush, visited the UK recently on its maiden operational assignment after taking part in war games in the Western Approaches.

Measuring 1092ft and generating 260,000shp from twin nuclear reactors, CVN-77 carries 90 aircraft, 5700 crew  and has a speed of at least 30 knots. She spent fi ve days at anchor off Stokes Bay in the Solent as her draft prevented her from entering Portsmouth Harbour.

Whether needing to signal her presence at speed or sounding her intentions and salutes in harbour, the carrier needs a reliable and powerful whistle. Given Kahlenberg Industries' long-standing relationship with the US Navy it is no surprise to see a Kahlenberg KPH-130 Piston Horn and accessories providing for USS George HW Bush’s sound signalling requirements.

Further information

Call Kahlenberg UK now on +44 (0)1635 35353 or email