A fathom, by the way, is six feet, so on a chart with soundings in fathoms, a number such as 03 means zero fathoms and three feet. The blue contour lines on a chart indicate a depth of 2m or 5m. There are a few commercial software packages that do automatic label placement for any kind of map or chart.. If you are not acquainted with charts, they can look intimidating, but their mystery cannot survive 10 minutes of study. The ECDIS user and developer communities are invited to help improve the presentation of ECDIS symbology and information in U.S. Nautical charts must be labeled with navigational and depth information. The depths listed are for low tide, so the actual depth is usually a little bit more than the charted depth. Below is a guide that will teach you how to read a nautical chart. 1. Thus the latitude scale (but not the longitude scale) can be used to measure distances on a chart. Nautical Chart is the all essential cartographic reference for boaters worldwide. The Symbol Legend for U.S. Nautical Chart Products. How to read a nautical chart – Buy – $29.95 Marine charts can be defined as the “street map of the ocean”. It is not the purpose of this AUX course to teach chart making, but -to explain and expound on chart making technique only as it relates to accurate positioning on a chart Chart No. To pilot your boat safely, you should carry paper nautical charts on your boat. chart’s top and bottom margins, and lines of longitude (meridi-ans) run from north to south. The ECDIS user and developer communities are invited to help improve the presentation of ECDIS symbology and information in U.S. Chart No. Being one of the most important navigational devices, charts have helped thousands of mariners understand the coastline and open ocean while enabling safe navigation at sea. Nautical charts … Nautical Charts Admiralty charts supplied by International Hydrographic Bureau, contain the most relevant information for Divers. A chart is not a map. About Charts 1 A nautical chart, whether paper or electronic, is an extraordinar-ily detailed representation in two dimensions of a three-dimen-sional world. 1 describes the symbols, abbreviations, and terms used on nautical charts. A nautical chart, however, is filled with information and it's a phenomenal navigational tool. Chart No. Except aboard the shallowest of craft, venturing beyond narrow or familiar waters means you need a chart. If you’re looking for an accurate and thorough map of lakes and marine areas, Nautical Chart is the resource you’ll want by your side. To simplify matters, try to find a chart that lists depth in feet. 1. How to read a nautical chart – Buy – $29.95 Marine charts can be defined as the “street map of the ocean”. How to Read Nautical Charts; ... Of all the various elements of a nautical chart, knowing the depth and understanding the underwater geography is probably the most fundamental. In any case, there are few resources (and even fewer good ones) out there for learning how to read a nautical chart. This video is about a couple of small, basic points on how to read a nautical chart. Nautical Charts Nautical charts (also known as marine or hydrographic charts) are maps primarily intended for navigation and should provide the mariner with clear, correct and up to date information to help plan, plot and navigate a safe course.