A former ally parked a boat down the shore from our base before we got to build down there. At the time, this was not much of a bother because we assumed he would come back online at some point and move it. Eventually we got to the point where we could no longer continue construction of our port because his ship is in the way. We removed him from the alliance but we know of no way currently in which we can remove his ship. We don't know exactly how long we have waited for this ship to disappear, but we estimate 4-5 weeks. Any help/suggestions on how to remove the ship would be appreciated. Thank you.