While exploring the Baltic Sea in 2006, a Polish oil firm stumbled upon the remains of Germany's first - and last - aircraft carrier at 80 meters depth off the coast near Gdansk - The Graf Z... Read allWhile exploring the Baltic Sea in 2006, a Polish oil firm stumbled upon the remains of Germany's first - and last - aircraft carrier at 80 meters depth off the coast near Gdansk - The Graf Zeppelin.While exploring the Baltic Sea in 2006, a Polish oil firm stumbled upon the remains of Germany's first - and last - aircraft carrier at 80 meters depth off the coast near Gdansk - The Graf Zeppelin.