Admiralty Chart
Admiralty Charts are nautical charts from the United Kingdom Hydrographic Office (UKHO) and are copyrighted by Crown . Over 3,000 maps are available and cover almost the entire world in various levels of detail, depending on the traffic density and dangers. Large-scale maps often show approach routes and entrances to ports , medium-sized maps cover intensively used coastal areas and small maps are intended for navigation in the open sea.
The maps contain: map zero , coastline , fairway marking , land and underwater contour lines, composition of the seabed as anchoring aid, tide information , prominent landmarks (e.g. church towers), traffic separation areas , lighthouses and, in short, everything that could support navigation.
The maps use the Mercator projection so that the position information can be taken directly from the maps, even if the declination and deviation have to be corrected. The use of this projection also has the advantage that straight lines drawn on the map indicate a constant course, although in reality such a line is not straight, but only a segment of a three-dimensional course .
The UKHO issues plans for various users. Standard cards are designed for seafarers covered by the International Convention for the Safety of Life at Sea . The size A2 is used by leisure users and there are also a number of complementary, digital products.
The seabed and the environment change regularly and it is important for users to keep the information up to date. The UKHO receives a large amount of new information and sifts through and filters out the most important for the users. These updates are published weekly in Admiralty Notices to Mariners and are indexed with a serial number and the week and year of publication. An annual overview will also be published shortly before the start of the sailing season. All maps should be updated regularly to maintain accuracy and security.
Web links
- Products and Services , The United Kingdom Hydrographic Office
- Admiralty charts (maps) ( Memento of January 21, 2005 in the Internet Archive ), The National Archives
Individual evidence
- ^ Admiralty Paper Charts , The United Kingdom Hydrographic Office.