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28-814: (Redirected from Arpa ) [REDACTED] Look up ARPA  or arpa in Wiktionary, the free dictionary. Arpa or ARPA may refer to: Given name [ edit ] Arpa Ke'un (died 1336), Ilkhan during the disintegration of the Mongol state in Persia Surname [ edit ] José Arpa (1858–1952), Spanish artist who worked in Spain, Mexico, and Texas Okay Arpa (born 1977), Turkish karateka Yvan Arpa , Swiss watch designer Geographical names [ edit ] Areni , formerly Arpa,

56-844: A Mexican harp used in conjunto jarocho music Rinaldo dall'Arpa (died 1603), Italian composer, singer, and harpist Acronym [ edit ] Advanced Research Projects Agency , former name of the US Defense Advanced Research Projects Agency ARPA-E , the Advanced Research Projects Agency-Energy, an agency created in 2007 within the US Department of Energy ARPA-H , the Advanced Research Projects Agency for Health, an organization created in 2022 within

84-481: A Mexican harp used in conjunto jarocho music Rinaldo dall'Arpa (died 1603), Italian composer, singer, and harpist Acronym [ edit ] Advanced Research Projects Agency , former name of the US Defense Advanced Research Projects Agency ARPA-E , the Advanced Research Projects Agency-Energy, an agency created in 2007 within the US Department of Energy ARPA-H , the Advanced Research Projects Agency for Health, an organization created in 2022 within

112-496: A raster-scan PPI generated on a television type of display. The integral ARPA and conventional radar units with a raster-scan display will gradually replace the radial-scan radar sets. The development of commercial marine radar entered a new phase in the 1980s when raster-scan displays that were compliant with the IMO Performance Standards were introduced. The radar picture of a raster-scan synthetic display

140-406: A raster-scan display is the brightness of the picture. This allows the observer to view the screen in almost all conditions of ambient light. Out of all the benefits offered by a raster-scan radar it is this ability which has assured its success. Another difference between the radial-scan and raster-scan displays is that the latter has a rectangular screen. The screen size is specified by the length of

168-402: A reduction in the workload of bridge personnel and fuller and quicker information on selected targets. A typical ARPA function gives a presentation of the current situation and uses computer technology to predict future situations. An ARPA assesses the risk of collision, and enables operator to see proposed maneuvers by own ship. While many different models of ARPAs are available on the market,

196-835: A village in Armenia Arpi, Armenia , also known as Arpa, a town in Armenia Arpa (river) , in Armenia Arpa (river), Chhattisgarh in Chhattisgarh, India Akhurian River , Arpa in Turkish, river in Turkey and Armenia Arpa Darreh , a village in Iran Arpa Valley , a high-altitude valley in Kyrgyzstan Music [ edit ] Arpa d'Eolo , a musical instrument Arpa jarocha ,

224-410: A village in Armenia Arpi, Armenia , also known as Arpa, a town in Armenia Arpa (river) , in Armenia Arpa (river), Chhattisgarh in Chhattisgarh, India Akhurian River , Arpa in Turkish, river in Turkey and Armenia Arpa Darreh , a village in Iran Arpa Valley , a high-altitude valley in Kyrgyzstan Music [ edit ] Arpa d'Eolo , a musical instrument Arpa jarocha ,

252-438: Is decided (after assessment of the initial plot) that it is necessary for own ship to manoeuvre, it is essential to determine the effect of that manoeuvre prior to its execution and to ensure that it will result in a safe passing distance. After the manoeuvre has been completed, plotting must be continued to ensure that the manoeuvre is having the desired effect. Because of the time taken for a change in speed to have any effect on

280-673: Is different from Wikidata All article disambiguation pages All disambiguation pages ARPA [REDACTED] Look up ARPA  or arpa in Wiktionary, the free dictionary. Arpa or ARPA may refer to: Given name [ edit ] Arpa Ke'un (died 1336), Ilkhan during the disintegration of the Mongol state in Persia Surname [ edit ] José Arpa (1858–1952), Spanish artist who worked in Spain, Mexico, and Texas Okay Arpa (born 1977), Turkish karateka Yvan Arpa , Swiss watch designer Geographical names [ edit ] Areni , formerly Arpa,

308-620: Is different from Wikidata All article disambiguation pages All disambiguation pages Automatic radar plotting aid Development of ARPA started after 1956, when the Italian liner SS Andrea Doria collided with the MS Stockholm in dense fog and sank off the east coast of the United States. ARPA radars started to emerge in the 1960s, with the development of microelectronics . The first commercially available ARPA

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336-403: Is produced on a television screen and is made up of a large number of horizontal lines which form a pattern known as a raster. This type of display is much more complex than the radial-scan synthetic display and requires a large amount of memory. There are a number of advantages for the operator of a raster-scan display and concurrently there are some deficiencies too. The most obvious advantage of

364-1147: The Amazon rainforest in Brazil American Rescue Plan Act of 2021 , an economic stimulus program of the United States Archaeological Resources Protection Act of 1979 , a federal law of the United States Arctic Research and Policy Act of 1984 (amended 1990) Automatic radar plotting aid , a capability of some marine radar systems Average revenue per account , a metric similar to average revenue per user Other uses [ edit ] Arpa Yeghegnadzor , an inactive Armenian football club Arpa şehriye , Turkish for orzo See also [ edit ] Biomedical Advanced Research and Development Authority (BARDA) Arpa Chai (disambiguation) All pages with titles beginning with ARPA All pages with titles containing ARPA Topics referred to by

392-807: The Amazon rainforest in Brazil American Rescue Plan Act of 2021 , an economic stimulus program of the United States Archaeological Resources Protection Act of 1979 , a federal law of the United States Arctic Research and Policy Act of 1984 (amended 1990) Automatic radar plotting aid , a capability of some marine radar systems Average revenue per account , a metric similar to average revenue per user Other uses [ edit ] Arpa Yeghegnadzor , an inactive Armenian football club Arpa şehriye , Turkish for orzo See also [ edit ] Biomedical Advanced Research and Development Authority (BARDA) Arpa Chai (disambiguation) All pages with titles beginning with ARPA All pages with titles containing ARPA Topics referred to by

420-656: The Automatic Radar Plotting Aids. ARPAs are computer assisted radar data processing systems which generate predictive vectors and other ship movement information. The International Maritime Organization (IMO) has set out certain standards amending the International Convention for the Safety of Life at Sea requirements regarding the carrying of suitable automated radar plotting aids. The primary function of ARPAs can be summarized in

448-797: The US National Institutes of Health ARPA-I , the Advanced Research Projects Agency for Infrastructure, an organization created in 2022 within the US Department of Transportation HSARPA , the Homeland Security Advanced Research Projects Agency, an agency within the Science and Technology Directorate at the US Department of Homeland Security IARPA , the Intelligence Advanced Research Projects Activity, an organization within

476-445: The US National Institutes of Health ARPA-I , the Advanced Research Projects Agency for Infrastructure, an organization created in 2022 within the US Department of Transportation HSARPA , the Homeland Security Advanced Research Projects Agency, an agency within the Science and Technology Directorate at the US Department of Homeland Security IARPA , the Intelligence Advanced Research Projects Activity, an organization within

504-837: The US Office of the Director of National Intelligence .arpa (address and routing parameter area), a top-level domain in the Domain Name System of the Internet Aerolíneas Paraguayas , a former Paraguayan airline Agenzie Regionali per la Protezione Ambientale , the Italian Regional Environmental Protection Agency Amazon Region Protected Areas Program , an initiative to expand protection of

532-410: The US Office of the Director of National Intelligence .arpa (address and routing parameter area), a top-level domain in the Domain Name System of the Internet Aerolíneas Paraguayas , a former Paraguayan airline Agenzie Regionali per la Protezione Ambientale , the Italian Regional Environmental Protection Agency Amazon Region Protected Areas Program , an initiative to expand protection of

560-467: The diagonal and the width and height of the screen with an approximate ratio of 4:3. The raster-scan television tubes have a much longer life than a traditional radar cathode ray tube (CRT). Although the tubes are cheaper over their counterpart, the complexity of the signal processing makes it more expensive overall. The IMO Performance Standards for radar to provide a plan display with an effective display diameter of 180mm, 250mm, or 340mm depending upon

588-507: The following functions are usually provided: The initial development and design of ARPAs were stand-alone units. That is because they were designed to be an addition to the conventional radar unit. All of the ARPA functions were installed on board as a separate unit, but needed to be interfaced with existing equipment to get the basic radar data. The primary benefits were cost and time savings for ships already equipped with radar. This of course

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616-487: The gross tonnage of the vessel. With the diameter parameters already chosen, the manufacturer has then to decide how to arrange the placement of the digital numerical data and control status indicators. The raster-scan display makes it easier for design engineers in the way auxiliary data can be written.raster from azimuth information digitized. At normal your ARPA does everything automatically, but here you find some more information about how to actually plot your ship. When it

644-405: The same term [REDACTED] This disambiguation page lists articles associated with the title ARPA . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=ARPA&oldid=1256178596 " Category : Disambiguation pages Hidden categories: Short description

672-405: The same term [REDACTED] This disambiguation page lists articles associated with the title ARPA . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=ARPA&oldid=1256178596 " Category : Disambiguation pages Hidden categories: Short description

700-409: The statement found under the IMO Performance Standards. It states a requirement of ARPAs: "to improve the standard of collision avoidance at sea: Reduce the workload of observers by enabling them to automatically obtain information so that they can perform as well with multiple targets as they can by manually plotting a single target". As we can see from this statement the principal advantages of ARPA are

728-405: The time radar was first introduced to the present day the radar picture has been presented on the screen of a cathode ray tube . Although the cathode ray tube has retained its function over the years, the way in which the picture is presented has changed considerably. From about the mid-1980s the first raster scan displays appeared. The radial-scan Plan position indicator (PPI) was replaced by

756-489: Was delivered to the cargo liner MV Taimyr in 1969 and was manufactured by Norcontrol  [ no ] , now a part of Kongsberg Gruppen . ARPA-enabled radars are now available even for small yachts. The availability of low cost microprocessors and the development of advanced computer technology during the 1970s and 1980s have made it possible to apply computer techniques to improve commercial marine radar systems. Radar manufacturers used this technology to create

784-433: Was not the ideal situation and eventually it was the integral ARPA that replaced the stand-alone unit. The majority of ARPAs manufactured in the 21st century integrate the ARPA features with the radar display. The modern integral ARPA combines the conventional radar data with the computer data processing systems into one unit. The main operational advantage is that both the radar and ARPA data are readily comparable. From

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