The wheelhouse on a modern Gas Carrier. The bridge team who will be present when the ship is manoevring in confined water, entering or leaving harbour, in a river, canal or narrow strait, is shown. The Navigating Cadet (in white shirt) is checking the navigation chart; a senior officer is monitoring the radar; the Captain (known as the Master) is in overall command; a senior deck rating is at the helm and steering the ship according to orders given by the Master. In a river, canal or in a harbour, a pilot (an officer who is specially trained to assist ships in the port, river or canal) is usually also present to assist the Master.   Photograph: Captain Steve Tucker