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Alexander Holtz and his partner Corrina Hoffmann on the Vacuna, an eight metre long sailing vessel which will be home to the two explorers over the course of a 100-day Baltic expedition, in Stralsund, Germany, 2 May 2017. Holtz, a trained chimney sweep, and Hoffmann, a biologist, plan on stops in Stockholm, Helsinki, Riga, Danzig, St. Petersburg and Kaliningrad. They are hoping both for scenic views and plenty of wildlife. Strong winds delayed their departure for a day. Photo: Stefan Sauer/dpa-Zentralbild/dpa /MediaPunch ***FOR USA ONLY***