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FAA sectional chart showing airspaces near Detroit, Michigan, United States. In United States aviation, a sectional aeronautical chart, often called a sectional chart or a sectional for short, is a type of aeronautical chart designed for air navigation under visual flight rules (VFR). In Australia, Canada and some other countries, the ...
The scale is 1:500,000, with a contour interval of 500 feet. The size of each sectional is designed to be "arm's width" when completely unfolded. The "northern" half of the section is on one side of the chart, and the "southern" on the reverse.
The existence of section lines made property descriptions far more straightforward than the old metes and bounds system. The establishment of standard east-west and north-south lines ("township" and "range lines") meant that deeds could be written without regard to temporary terrain features such as trees, piles of rocks, fences, and the like, and be worded in the style such as "Lying and ...
It has become common use to chart governmental organizations in multiple (partly) overlapping organizational charts. For example, here shown the 2011 Organizational chart of the Government of the United States from The United States Government Manual 2011, was the first of a series of over 70 charts of the Government of the United States. [20]
U.S. Census Bureau regions and divisions. Since 1950, the United States Census Bureau defines four statistical regions, with nine divisions. [1] [2] The Census Bureau region definition is "widely used ... for data collection and analysis", [3] and is the most commonly used classification system.
This is a list of current formations of the United States Army, which is constantly changing as the Army changes its structure over time. Due to the nature of those changes, specifically the restructuring of brigades into autonomous modular brigades, debate has arisen as to whether brigades are units or formations; for the purposes of this list, brigades are currently excluded.
Establishes the direct election of United States senators by popular vote. May 13, 1912 April 8, 1913 330 days 18th: Prohibits the manufacturing or sale of alcohol within the United States. (Repealed on December 5, 1933 by the 21st Amendment.) December 18, 1917 January 16, 1919 1 year, 29 days 19th: Grants women the right to vote. June 4, 1919
By law (Section 2.) the president becomes the Commander in Chief of the Army and Navy, Militia of several states when called into service, has power to make treaties and appointments to office "with the Advice and Consent of the Senate," receive Ambassadors and Public Ministers, and "take care that the laws be faithfully executed" (Section 3.)