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Radar Warning Of Pearl Harbor Attack
On the morning of 7 December 1941 the SCR-270 radar at the Opana Radar Site on northern Oahu detected a large number of aircraft approaching from the north. This information was conveyed to Fort Shafter’s Intercept Center. The report was dismissed by Lieutenant Kermit Tyler who assumed that it was a scheduled flight of aircraft from the continental United States. The radar had in fact detected the first wave of Imperial Japanese Navy Air Service aircraft about to launch the Attack on Pearl Harbor. Attack on Pearl Harbor On 6 December 1941, Private Joseph P. McDonald arrived for his 05:00 shift to relieve his tent mate and fellow staffer, Private Richard Schimmel, at Fort Shafter's Intercept Center. The center served as the tracking center for the US Army Air Corps (USAAC)'s radar monitoring, then a new technology. It utilized five radar systems located across Oahu. For several weeks, Intercept Center staff had been on high alert because military intelligence had not been able to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SCR-270
The SCR-270 (Set Complete Radio model 270) was one of the first operational early-warning radars. It was the U.S. Army's primary long-distance radar throughout World War II and was deployed around the world. It is also known as the Pearl Harbor Radar, since it was an SCR-270 set that detected the incoming raid about 45 minutes before the December 7, 1941, attack on Pearl Harbor commenced. Two versions were produced, the mobile SCR-270, and the fixed SCR-271 which used the same electronics but used an antenna with somewhat greater resolution. An upgraded version, the SCR-289, was also produced, but saw little use. The -270 versions were eventually replaced by newer microwave units based on cavity magnetron that was introduced to the US during the Tizard Mission. The only early warning system of the sort to see action in World War II was the AN/CPS-1, which was available in mid-1944, in time for D-day. Building of the radar The Signal Corps had been experimenting with some rad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wheeler Field
Wheeler Army Airfield , also known as Wheeler Field and formerly as Wheeler Air Force Base, is a United States Army post located in the City & County of Honolulu and in the Wahiawa District of the Island of O'ahu, Hawaii. It is a National Historic Landmark for its role in the 7 December 1941 Japanese attack on Pearl Harbor. Overview Wheeler AAF comprises approximately of land adjacent to Schofield Barracks and is home to a variety of Department of Defense activities including the Defense Information Systems Agency (DISA), the 169th Aircraft Control & Warning Squadron (169 ACWS) of the Hawaii Air National Guard, the 193rd Aviation Regiment (Medium Lift), Detachment 55 Operational Support Airlift (Det 55 OSA) of the Hawaii Army National Guard, the Regular Army's 25th Infantry Division's 25th Combat Aviation Brigade composed of the 25th Aviation Regiment, the 2nd Squadron-6th Cavalry Regiment, and the 209th Aviation Support Battalion, also located on wheeler is the Trial Defens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sylvania Electric Products
Sylvania Electric Products Inc. was an American manufacturer of diverse electrical equipment, including at various times radio transceivers, vacuum tubes, semiconductors, and mainframe computers such as MOBIDIC. They were one of the companies involved in the development of the COBOL programming language. History The ''Hygrade Sylvania Corporation'' was formed when '' NILCO'', ''Sylvania'' and '' Hygrade Lamp Company'' merged into one company in 1931. In 1939, Hygrade Sylvania started preliminary research on fluorescent technology, and later that year, demonstrated the first linear, or tubular, fluorescent lamp. It was featured at the 1939 New York World's Fair. Sylvania was also a manufacturer of both vacuum tubes and transistors. In 1942, the company changed its name to Sylvania Electric Products Inc. During World War II, Sylvania was chosen from among several competing companies to manufacture the miniature vacuum tubes used in proximity fuze shells due to its quality s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Litton Industries
Litton Industries was a large defense contractor in the United States named after inventor Charles Litton Sr. During the 1960s, the company began acquiring many unrelated firms and became one of the largest conglomerates in the United States. At its peak, in addition to many defense-related companies, it also owned both Royal Typewriters and Adler, Moffat major appliances, Stouffer's frozen foods, and various office equipment and furniture companies. Like many conglomerates, the company suffered significant declines in the 1970s, selling off many of its unrelated brands and had largely returned to its defense roots by the 1980s. The company continued to shrink after the ending of the Cold War and by the late 1990s was a corporate takeover target. The company was purchased by Northrop Grumman in 2001. History Litton Industries was originally established as an electronics company building navigation, communications and electronic warfare equipment. They diversified and becam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Railroad
The Pennsylvania Railroad (reporting mark PRR), legal name The Pennsylvania Railroad Company also known as the "Pennsy", was an American Class I railroad that was established in 1846 and headquartered in Philadelphia, Pennsylvania. It was named for the commonwealth in which it was established. By 1882, Pennsylvania Railroad had become the largest railroad (by traffic and revenue), the largest transportation enterprise, and the largest corporation in the world. Its budget was second only to the U.S. government. Over the years, it acquired, merged with, or owned part of at least 800 other rail lines and companies. At the end of 1926, it operated of rail line;This mileage includes companies independently operated. PRR miles of all tracks, which includes first (or main), second, third, fourth, and sidings, totalled 28,040.49 at the end of 1926. in the 1920s, it carried nearly three times the traffic as other railroads of comparable length, such as the Union Pacific and Atchison, T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amchitka
Amchitka (; ale, Amchixtax̂; russian: Амчитка) is a volcanic, tectonically unstable and uninhabited island in the Rat Islands group of the Aleutian Islands in southwest Alaska. It is part of the Alaska Maritime National Wildlife Refuge. The island, with a land area of roughly , is about long and wide. The area has a maritime climate, with many storms, and mostly overcast skies. Amchitka was populated for more than 2,500 years by the Aleut people, but has had no permanent population since 1832. The island has been part of the United States since the Alaska Purchase of 1867. During World War II, it was used as an airfield by US forces in the Aleutian Islands Campaign. Amchitka was selected by the United States Atomic Energy Commission to be the site for underground detonations of nuclear weapons. Three such tests were carried out: ''Long Shot'', an blast in 1965; ''Milrow'', a blast in 1969; and '' Cannikin'' in 1971 – at , the largest underground test eve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adak Island
Adak Island ( ale, Adaax, russian: Адак) or Father Island is an island near the western extent of the Andreanof Islands group of the Aleutian Islands in Alaska. Alaska's southernmost town, Adak, Alaska, Adak, is located on the island. The island has a land area of , measuring long and wide, making it the List of islands of the United States by area, 25th largest island in the United States. Due to harsh winds, frequent cloud cover, and cold temperatures, vegetation is mostly tundra (grasses, mosses, berries, low-lying flowering plants) at lower elevations. The highest point is Mount Moffett, near the northwest end of the island, at an elevation of 3,924 feet (1,196 m). It is snow covered the greater part of the year. Adak is its largest and principal city. The word ''Adak'' is from the Aleut language, Aleut word ''adaq'', which means "father". History Adak Island has been the home to Aleut people, Aleut peoples since antiquity. Russian explorers in the 18th century also v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Second Lieutenant
Second lieutenant is a junior commissioned officer military rank in many armed forces, comparable to NATO OF-1 rank. Australia The rank of second lieutenant existed in the military forces of the Australian colonies and Australian Army until 1986. In the colonial forces, which closely followed the practices of the British military, the rank of second lieutenant began to replace ranks such as ensign and cornet from 1871. New appointments to the rank of second lieutenant ceased in the regular army in 1986. Immediately prior to this change, the rank had been effectively reserved for new graduates from the Officer Cadet School, Portsea which closed in 1985. (Graduates of the Australian Defence Force Academy (ADFA) and the Royal Military College, Duntroon (RMC-D) are commissioned as lieutenants.). The rank of second lieutenant is only appointed to officers in special appointments such as training institutions, university regiments and while under probation during training. Trai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Officer Candidate School
An officer candidate school (OCS) is a military school which trains civilians and Enlisted rank, enlisted personnel in order for them to gain a Commission (document), commission as Commissioned officer, officers in the armed forces of a country. How OCS is run differs between countries and services. Typically, officer candidates have already attained post-secondary education, and sometimes a bachelor's degree, and undergo a short duration of training (not more than a year) which focuses primarily on military skills and leadership. This is in contrast with a military academy which includes academic instruction leading to a bachelor's degree. Australia Officer Cadet School of Australia – Portsea (OCS Portsea) commenced training officers for the Australian Army in 1951 and continued through to the end of 1985. Since OCS Portsea's closure in 1985, all Australian Army Officer training has been conducted at the Royal Military College, Duntroon in Canberra. During the Vietnam War, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Distinguished Service Medal
Distinguished Service Medal (DSM) is a high award of a nation. Examples include: *Distinguished Service Medal (Australia) (established 1991), awarded to personnel of the Australian Defence Force for distinguished leadership in action * Distinguished Service Medal (India) (established 1907), awarded by the British Empire to Indian citizens serving in the Indian armed forces and police * Distinguished Service Medal (Ireland), a series of three decorations issued by the Irish Defence Forces * Medal of Distinguished Service (Israel) (established 1970), awarded for exemplary bravery in the line of duty * Distinguished Service Medal (Mexico), awarded to Army and Air Force personnel who demonstrate initiative and dedication throughout the course of their military career * Coast Guard Auxiliary Distinguished Service Medal, Philippines (established 1972) * Vishista Seva Vibhushanaya or Distinguished Service Decoration (Sri Lanka) (established 1981), awarded for exceptional, distinguished, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Board Of Inquiry
Naval Board of Inquiry and Naval Court of Inquiry are two types of investigative court proceedings, conducted by the United States Navy in response to an event that adversely affects the performance, or reputation, of the fleet or one of its ships or stations. Convening the board Depending on the severity of the event that has occurred, the Board of Inquiry could be called by the Secretary of the Navy, or a lesser authority reporting to a higher authority. In any case, the authority calling for the board of inquiry must be of an authority superior to the authority related to the unanticipated event. The process could sometimes be to a month, depending on the YDP. Last-minute alteration and formatting by the YDP and senior board members will make the job much more difficult for the junior board members to get the report done. Purpose of the board Naval Boards of Inquiry are called to examine all particulars concerned with the event in question, and to determine facts and cau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Associated Press
The Associated Press (AP) is an American non-profit news agency headquartered in New York City. Founded in 1846, it operates as a cooperative, unincorporated association. It produces news reports that are distributed to its members, U.S. newspapers and broadcasters. The AP has earned 56 Pulitzer Prizes, including 34 for photography, since the award was established in 1917. It is also known for publishing the widely used '' AP Stylebook''. By 2016, news collected by the AP was published and republished by more than 1,300 newspapers and broadcasters, English, Spanish, and Arabic. The AP operates 248 news bureaus in 99 countries. It also operates the AP Radio Network, which provides newscasts twice hourly for broadcast and satellite radio and television stations. Many newspapers and broadcasters outside the United States are AP subscribers, paying a fee to use AP material without being contributing members of the cooperative. As part of their cooperative agreement with the AP, most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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