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An Admiralty Pattern anchor; when deployed on the seafloor the stock forces one of its flukes into the bottom. The Admiralty Pattern anchor, or simply "Admiralty", also known as a "Fisherman", consists of a central shank with a ring or shackle for attaching the rode (the rope, chain, or cable connecting the ship and the anchor). At the other ...
A stockless anchor (or "patent anchor") is a streamlined derivation of the traditional Admiralty anchor used aboard large ships. Patented in England in 1821, [1] it eliminated the stock of the Admiralty, making it both easier to handle and stow. Though it did not hold as well as an Admiralty, the trade-off proved acceptable and the stockless ...
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.
A clerk in Plymouth Yard, named Pering, in the early part of that century (1813) introduced curved arms; and after 1852 the British admiralty anchor, under the direction of the Board, was supplied to H.M. ships, followed by Lieutenant (afterwards Captain) Rodger's anchor. Rodger's anchor marked a great departure from the form of previous anchors.
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.
Two types of anchor were found, one of oak with iron-tipped flukes and a stock of lead and another of iron with a folding timber stock that closely matched the design of the Admiralty pattern anchor, re-invented in 1841. In the 1960s, a similar anchor was found in Pompeii, and in 1974 another was found buried near Aberdarewllyn in Gwynedd ...
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English: Nautical chart of the Thames Estuary and North Sea from Kentish Knock and the Naze to The Nore, at a scale of 1:75,000. Not current - not to be used for navigation! Not current - not to be used for navigation!