A boatswain (ˈboʊsən , ˈboʊtsweɪn ), bo's'n, bos'n, or bosun, also known as a deck boss, or a qualified member of the deck department, is the most senior rate of the deck department and is responsible for the components of a ship's hull. The boatswain supervises the other members of the ship's deck department, and typically is not a watchstander, except on vessels with small crews. Additional duties vary depending upon ship, crew, and circumstances. The word boatswain has been in the English language since approximately 1450. It is derived from late Old English batswegen, from bat (boat) concatenated with Old Norse sveinn (swain), meaning a young man, apprentice, a follower, retainer or servant. Directly translated to modern Norwegian it would be båtsvenn, while the actual crew title in Norwegian is båtsmann ("boats-man"). While the phonetic spelling bosun is reported as having been observed since 1868, this latter spelling was used in Shakespeare's The Tempest written in 1611, and as bos'n in later editions. The rank of boatswain is the oldest rank in the Royal Navy, and its origins can be traced back to the year 1040. In that year, when five English ports began furnishing warships to King Edward the Confessor in exchange for certain privileges, they also furnished crews whose officers were the master, boatswain, carpenter, and cook. Later these officers were warranted by the British Admiralty. They maintained and sailed the ships and were the standing officers of the navy. The boatswain was the officer responsible for the care of the rigging, cordage, anchors, sails, boats, flags and other stores. The Royal Navy's last official boatswain, Commander E.W. Andrew OBE, retired in 1990. However, most RN vessels still have a Chief Boatswain's Mate (or "Buffer"), who is the most senior rating in the Seaman Specialist department. The rank of cadet boatswain, in some schools, is the second highest rank in the combined cadet force naval section that a cadet can attain, below the rank of coxswain and above the rank of leading hand.