The MOSAiC team announces and invites you to participate in the MOSAiC Implementation Workshop on November 13th to 16th. 2017. The workshop will be held at the Arctic and Antarctic Research Institute in St. Petersburg, Russia. The workshop is an important step to forward the planning of the MOSAiC expedition through the Arctic.The aim is to coordinate the scientific work on board of RV Polarstern and the distributed network. Additionally, the development of a modeling strategy will be pushed forward.