The Reichsflotte (Imperial Fleet) was the first all-German Navy, founded on 14 June 1848.
The German Confederation, founded in 1815, was initially not in need of a navy, as it could rely on three members who commanded large fleets: The Grand Duke of Luxembourg as commander of the Royal Dutch Navy, the Duke of Holstein as the commander of the Danish Navy, and last but not least, the King of Hanover as commander of the British Royal Navy.
This had changed by the late 1830s, though, as the Kings of the Netherlands and Great Britain ceased to be members of the German Confederation, and Denmark turned against Germany in the First Schleswig War that started in early 1848. Soon, the Danish Navy stopped all German trade in the North Sea and the Baltic Sea.
Sail-Frigates Eckenförde (captured Danish SMS Gefion; 1852)
and Deutschland 1849