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The British admiralty charts are compiled, drawn and issued by the Hydrographic Office. This department of the Admiralty was established under Earl Spencer by an order in council in 1795, consisting of the Hydrographer, Alexander Dalrymple, one assistant and a draughtsman.
Use of colour in British Admiralty charts. Depths which have been measured are indicated by the numbers shown on the chart. Depths on charts published in most parts of the world use metres. Older charts, as well as those published by the United States government, may use feet or fathoms. Depth contour lines show the shape of underwater relief ...
The Admiralty's first Hydrographer was Alexander Dalrymple, [2] appointed in 1795 on the order of King George III and the existing charts were brought together and catalogued. The first chart Dalrymple published as Hydrographer to the Admiralty (of Quiberon Bay in Brittany) did not appear until 1800. [3]
It evolved from *Admiralty Navy War Council, (1909–1912) which in turn became the Admiralty War Staff, (1912–1917) before finally becoming the Admiralty Naval Staff in 1917. It was the former senior command, operational planning, policy and strategy department within the British Admiralty.
The Admiralty appointed Alexander Dalrymple as hydrographer on 12 August 1795, with a remit to gather and distribute charts to HM Ships. Within a year existing charts had been collated, and the first catalogue published. It was five years before the first chart—of Quiberon Bay in Brittany—was produced by the Hydrographer. [1]
Tidal diamonds are symbols on British admiralty charts and others [a] that indicate the direction and speed of tidal streams. The symbols consist of a letter of the ISO basic Latin alphabet in a rhombus, printed in purple ink. [b] On any particular chart each tidal diamond will have a unique letter starting from "A" and continuing ...
British Admirals. Britannia Viewing the Conquerors of the Seas, 1800. Admiral is a senior rank of the Royal Navy of the United Kingdom, which equates to the NATO rank code OF-9, formally outranked only by the rank admiral of the fleet. The rank of admiral is currently the highest rank to which an officer in the Royal Navy can be promoted ...
Example of colours used in British Admiralty w:nautical charts. Date: 18 August 2007: Source: Self-made in Inkscape, based on en:Image:Nautical chart colour.PNG. Author: Mysid (original PNG by en:User:Mark.murphy)
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