Brandtaucher sinks during trials at Kiel

Background. Wilhelm Bauer, a Bavarian engineer, designed Brandtaucher in January 1850 to counter the Danish naval blockade during the First Schleswig War. The submersible was built by Schweffel & Howaldt in Kiel for the Schleswig-Holstein Flotilla. Initial trials occurred in December 1850, but military authorities ordered a public demonstration on 1 February 1851, despite Bauer's desire for further improvements.

The Sinking. On 1 February 1851, Brandtaucher sank in Kiel Harbour following a diving accident during acceptance trials. The vessel, known as the oldest surviving submarine, was lost during this public show. Bauer and his two crewmen successfully escaped the sinking craft. The incident occurred in the context of the First Schleswig War, where Kiel served as the capital of Schleswig-Holstein.

Aftermath. Following the sinking, Bauer immediately began planning an improved, larger submarine. However, the government of Schleswig-Holstein refused to support his efforts due to the negative experience with the first vessel. The incident highlighted the challenges faced by Bauer, who had left the Bavarian Army to join the Schleswig-Holstein forces.