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Amateur First Grade required an essay-type examination and five (later ten) words per minute code examination before a Radio Inspector at one of the Department's field offices. This class of license was renamed Amateur Class in 1927 and then Amateur First Class in 1932. Amateur Radio licensing in the United States began in mid-December 1912.
Private Use Areas. In Unicode, a Private Use Area ( PUA) is a range of code points that, by definition, will not be assigned characters by the Unicode Consortium. [1] Three private use areas are defined: one in the Basic Multilingual Plane ( U+E000–U+F8FF ), and one each in, and nearly covering, planes 15 and 16 ( U+F0000–U+FFFFD, U+100000 ...
The airspace class designation is in effect only during the hours of tower and approach operation at the primary airport; the airspace reverts to Class D if approach control is not operating, and to class E or G if the tower is closed. The vertical boundary is usually 4,000 feet (1,200 m) above the airport surface.
List of Dewey Decimal classes. The Dewey Decimal Classification (DDC) is structured around ten main classes covering the entire world of knowledge; each main class is further structured into ten hierarchical divisions, each having ten divisions of increasing specificity. [1] As a system of library classification the DDC is "arranged by ...
Ronald Erwin McNair (October 21, 1950 – January 28, 1986) was an American NASA astronaut and physicist. He died at the age of 35 during the launch of the Space Shuttle Challenger on mission STS-51-L, in which he was serving as one of three mission specialists in a crew of seven.
The current use of the IPv6 Traffic Class field divides this between a 6 bit Differentiated Services Code Point and a 2-bit Explicit Congestion Notification field. [34] Extension headers carry options that are used for special treatment of a packet in the network, e.g., for routing, fragmentation, and for security using the IPsec framework.
Kalpana Chawla. Kalpana Chawla (17 March 1962 – 1 February 2003) [2] was an Indian-born American astronaut and aerospace engineer who was the first woman of Indian origin to fly to space. [3] [4] She first flew on Space Shuttle Columbia in 1997 as a mission specialist and primary robotic arm operator aboard STS-87.
Class 6.1: Poison. Hazardous Materials. Class 6.2: Biohazard. Hazardous Materials. Class 6: Packing Group III. Hazardous Materials. Class 6: Toxic. Poison: 454 kg (1001 lb) or more gross weight of poisonous materials that are not in Hazard Zone A or B (see Assignment of packing groups and hazard zones below). For U.S. Domestic Use only.