The starting location of the Pancake Boat Amsterdam is in Amsterdam North. The boat is sitiated next to the local ferry. From Central Station you can cross with the free ferry to the shipyard. You also can take the bus; line 91 and 94 from Oosterdokskade (behind Central Station). Get off at the stop Klaprozenweg.
Address: Ms. van Riemsdijkweg, 1033 RD Amsterdam