Fitting-out work was delayed significantly when a dockyard worker accidentally removed a blanking plate from a large pipe, which allowed a significant amount of water to flood the ship. The ship did not have its watertight bulkheads installed, so the water spread throughout the ship and caused it to list to port and sink to the bottom of the dock. The ship had to be pumped dry and cleaned out, which proved to be a laborious task. The ship was completed by the end of September 1909. She was commissioned into the High Seas Fleet on 1 October 1909, and trials commenced immediately. , the ship that spurred "Nassau"s construction, had been launched 25 months before "Nassau", on 2 February 1906.