Heinkel He 59, 60, 114 and 115

The Heinkel He 59 was a large twin-engined biplane floatplane that had been designed in 1930 to serve as either a bomber or reconnaissance aircraft, and that saw some limited service at the start of the Second World War.
The Heinkel He 60 was a sturdy single-engined twin-float biplane that was used as coastal and marine reconnaissance aircraft, as well as operating from German battleships and cruisers.
The Heinkel He 114 was a disappointing single engined biplane floatplane designed to replace the Heinkel He 60 as a shipboard reconnaissance aircraft.
The Heinkel He 115 was the most successful German floatplane of the Second World War, and served as a reconnaissance and attack aircraft.