On July 27, 2006, the Polish Navy announced that they have identified a sunken vessal as the remains of the Graf Zeppelin, Nazi Germany’s one and only aircraft Carrier. The wreck was discovered by a Polish oil company in early July and investigated by the Polish Navy. The Graf Zeppelin was plagued with problems and never went into service. However, several aircraft types were developed into navailaized versions including the Ju 87C which was equipped with folding wings.