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Initially charts were produced only for use by the Navy, but in 1821, Thomas Hurd, who had succeeded Dalrymple as Hydrographer in 1808, persuaded the Admiralty to allow sales to the public. [ 4 ] : 27 [ 5 ] : 105–106 The first catalogue of Admiralty charts was published in 1825, and listed 756 charts.
Under Dalrymple's successor, Captain Thomas Hurd, Admiralty charts were sold to the general public, and by 1825, there were 736 charts listed in the catalogue. In 1829, the first Sailing Directions were published, and in 1833, under Rear-Admiral Sir Francis Beaufort —of the eponymous Beaufort scale —the tide tables were first published.
While with Canceaux Hurd helped Samuel Holland conduct hydrographic surveys. Hurd passed his lieutenant's examination on 1 March 1775, and went on to serve aboard Lord Howe's flagship, HMS Eagle. Howe appointed Hurd as lieutenant of HMS Unicorn on 30 January 1777. Unicorn was a frigate under the command of Captain John Ford, which had a ...
Dalrymple was succeeded on his death in 1808 by Captain Thomas Hurd, under whose stewardship the department was given permission to sell charts to the public in 1821. [ 4 ] In 1819, Captain Hurd entered into a bi-lateral agreement with Denmark to exchange charts and publications covering areas of mutual interest.
The first chart produced under the direction of the Admiralty, was a chart of Quiberon Bay in Brittany, and it appeared in 1800. Under Captain Thomas Hurd the department received its first professional guidelines, and the first catalogs were published and made available to the public and to other nations as well.
Printable version; In other projects ... British Admiralty hydrographer Thomas Hurd, and John Miers, ... Admiralty Chart 1776. UK Hydrographic Office, 1968
Hurd Deep running from bottom left to top right of an extract from a 1955 Admiralty Chart 1955 Admiralty Chart No 2649 showing Hurd Deep in the context of the English Channel. Hurd's Deep (or Hurd Deep) is an underwater valley in the English Channel, northwest of the Channel Islands. Its maximum depth is about 180 m (590 ft; 98 fathoms), making ...
On nautical charts, the top of the chart is always true north, rather than magnetic north, towards which a compass points. Most charts include a compass rose depicting the variation between magnetic and true north. However, the use of the Mercator projection has drawbacks. This projection shows the lines of longitude as parallel.