U.S. Navy Regional Climatic Studies is a climatology atlas, available from the National Climatic Data Center (NCDC). These atlases contain climatological summaries for the following parameters: clouds, precipitation, visibility tables, ceiling visibility (mid range), ceiling visibility (low range), wind-visibility-cloudiness, mean scalar wind speed, wind speed less than 11 and ... greater than 34 knots, wind speed 11-21 and 22-33 knots, air and sea temperature, wave height, and surface conditions. These observation statistics are presented on monthly charts in the form of graphs, tables, and isopleth maps. The marine data were summarized and machine plotted by one-degree quadrangle for the isopleth analyses. Approximately six and one-half million surface marine observations were used in computing the statistics. These data were collected by ships of various registry traveling in the area. Data for these studies date from 1854 to 1987. Most of the observations were collected in the last 40 years which is significant because these observations contain more elements than pre-1948 reports. The density of observations is greatest along major shipping routes. The atlas is softcover and is approximately 10 by 14 inches in dimension and approximately 300 pages. The twelve volumes that are available through the online store consists of: Mediterranean Sea, Central East Asian Coast and Associated waters, Southern African waters, U.S. Atlantic Coast and associated waters, Mozambique and adjacent waters, Barents Sea and adjacent waters, Sea of Okhotsk and adjacent waters, Greenland, Iceland and U.K. Gap and associated waters, Persian Gulf and Northern Arabian Sea, Red Sea and adjacent waters, Gulf of Aden and adjacent waters, North Sea, Celtic Sea, Irish Sea and associated waters.