The DHR H100-serie air horn for pleasure and sailboats with a length from 12 to 20 metres.
The DHR H200-series for all kinds of (seagoing) vessels like workboats, patrol boats, inland shipping and ferries.
The DHR H300-serie Three toned horn for inland navigation vessels and small sea-going vessels.
The DHR H300 Serial Air Horns for small seagoing and inland navigation vessels
The DHR H400 air horn for sea-going vessels up to 75mtr. and inland vessels on SeeSchifffahrtstrassen.