Kahlenberg Industries, Inc., a manufacturer of marine equipment since 1895, designed and produced its first marine air horn nearly 80 years ago. Today, the unending, long-term commitment to quality continues. Through ongoing refinement and the introduction of new models, Kahlenberg Sound Signals have developed a reputation for quality worldwide, for their reliability, durable construction and distinctive sound. All Kahlenberg marine sound signaling equipment is certified to USCG/IMO requirements for frequency and decibel level for its intended application. Various classification society type approvals are available for all models for all sizes and types of marine vessels.