Tirpitz aboard HMS Glasgow, c.1915. Photo in the collection of the Imperial War Museums.
Litograph of Lucas, created c.1837 by Antoine Maurin. Original now in the public domain.
Painting of Tromp by Jan Lievens. Original in the collections of the National Maritime Museum, Greenwich, England.
Statue of Zheng He in Malacca, Malaya. Photo uploaded to Wikipedia by user hassan saeed.
Raeder, c.1940, as Großadmiral of the Kriegsmarine. Photo in the collection of the German Federal Archives.
Engraving of Chabot by André Thévet, c.1584. Original in the public domain.
Engraving of Osterman, c.1740-41, during his tenure as General-Admiral. Original in the public domain.
Kinkaid in 1945, while commander of the US Seventh Fleet. Photo in the collection of the US Naval Historical Center.
Painting of Admiral Somerville, c.1943, by William Timym. Original in the collection of the UK National Archives.
Ijūin Gorō c.1910-20. Photo in the collections of the National Diet Library.