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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 enquiries@kahlenberg.co.uk 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.

Sound signal controls

Kahlenberg manufactures a large range of sound signal controls and accessories to cope with installation of air horns and other signalling apparatus aboard the smallest leisure boat up to the largest commercial and military ship. We have featured some of the most popular items in the range here and stock of these products is held in Europe. But a wider range is available, please contact Kahlenberg UK on +44(0)1635 35 35 35 or This e-mail address is being protected from spambots. You need JavaScript enabled to view it and we will be pleased to advise.

M-522C Sound Signal Controller

Kahlenberg M-522C marine sound signal controllerThe new Kahlenberg M-522C Sound Signal and Light Controller provides automated sound and light signals according to IMO and SOLAS requirements in a user friendly format. The M-522C controls multiple horns or whistles and a morse light' it can also be configured to work with external alarm systems and sound surveillance systems.

The M-511C not only automatically sounds the appropriate signal for restricted visibility requirements under Rule 35 of the International Regulations for Preventing Collisions at Sea, 1972 (COLREGs), but also performs manoeuvring codes, a danger code and general alarm as well as offering a standard 'at-will' button. It completely frees the skipper, master or watch from remembering the frequency of sound signals, leaving them able to fully focus on the safety of their boat or ship.

M-511C Sound Signal Controller read more

M-511C Sound Signal Controller

Kahlenberg M-511C marine sound signal controllerThe Kahlenberg M-511C Sound Signal Controller is a fully enclosed, flush mount panel that provides for all of a commercial or leisure vessel's automatic sound signal requirements.

The M-511C not only automatically sounds the appropriate signal for restricted visibility requirements under Rule 35 of the International Regulations for Preventing Collisions at Sea, 1972 (COLREGs), but also performs manoeuvring codes, a danger code and general alarm as well as offering a standard 'at-will' button. It completely frees the skipper, master or watch from remembering the frequency of sound signals, leaving them able to fully focus on the safety of their boat or ship.

M-511C Sound Signal Controller read more

Push button sound signal switches

Kahlenberg M-126, 19220 and 19215-LC air horn push buttonsKahlenberg has a broad range of momentary push button switches to suit all types of air horn and other sound signal devices. Here we show a sample of three of the most popular that are held in stock in Europe but if these do not meet your requirements please contact us for more options.

Air horn push button switches read more

M-611 Sound and Light Signal Controller

Kahlenberg M-611C Sound Signal Controller

The Kahlenberg M-611 Sound and Light Signal Controller is a rugged panel offering complex automatic control of the marine sound and light signals required by IMO and SOLAS.

This M-611 controls automated restricted visibility codes, manoeuvring codes and general alarm and abandon ship codes per IMO and SOLAS requirements. It can control multiple horns, the Morse light, the ship's bell and gong and can be configured for use with external alarm systems and sound surveillance systems.

M-611C Sound and Light Controller read more

M-485A Sound Signal Timer

Kahlenberg M-485A Sound Signal Timer front viewThe Kahlenberg M-485A Sound Signal Timer offers a simple but elegant solution to relieving a skipper or watch from repeatedly sounding the vessel's air horn or other sound signal apparatus. Full concentration can instead be focused on the helm, keeping a good watch and dealing with any emergency.

The M-485A Sound Signal Timer is packaged as a neat, waterproof two rocker switch module with clear labelling to explain operation. It can easily be used in conjunction with the matching M-126 push button switch.

M-485A Sound Signal Controller read more

Further information

Call Kahlenberg UK now on +44 (0)1635 35353 or email enquiries@kahlenberg.co.uk