Melbourne's skipper may have saved a lot of money by not using tugs. They seem to charge by level of service. One regular arrival would throw a line to the dockside but never to the attendant tug. Sometimes he would let the tug nose him in by pushing with its bow, and other times he would refuse all contact, getting the tug to come up to him stern first and open up, blowing him sideways with propwash. Fine judgement required.