The Corporation of Trinity House of Deptford Strond, known as Trinity House (formally The Master Wardens and Assistants of the Guild Fraternity or Brotherhood of the most glorious and undivided Trinity and of St. Clement in the Parish of Deptford Strond in the County of Kent), is a private corporation governed under a Royal Charter (rather than a non-departmental public body). It has three core functions: it is the official General Lighthouse Authority for England, Wales, the Channel Islands and Gibraltar, responsible for the provision and maintenance of navigational aids, such as lighthouses, lightvessels, buoys, and maritime radio/satellite communication systems. Trinity House is also an official deep sea pilotage authority, providing expert navigators for ships trading in Northern Europ