 Other advantages of the nozzle are the ship can be steered astern which a conventional rudder cannot, and the ship can be steered fully under control to a standstill switching between ahead and astern mode to give complete control over speed.In addition to being fully conversant with the principles of seamanship and ship-handling, a good pilot will have developed his or her sense of 'situational awareness' to a point well beyond that of a member of a ship's crew; his reactions will appear to be instinctive, positive and at all times safe.Most commercial vessels in excess of size limits determined by local authorities are handled in confined areas by a marine (or maritime) pilot.