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Visual identification of underwater objects using a ROV-type vehicle: "Graf Zeppelin" wreck investigation The article presents a method of visual identification of underwater objects using a remotely controlled underwater ROV-type vehicle. The method was developed in the Department of Diving Technology and Underwater Activities, Polish Naval Academy, and was positively verified when identifying wrecks of such vessels as "General von Steuben", "Fryderyk Engels" and "Graf Zeppelin". The article gives a description of the method, illustrated by samples of its use for investigating the wreck of "Graf Zeppelin"