Commercial Navigation Systems for Long-range Subsonic Transports in the 1970's

1969 ◽  
Vol 22 (04) ◽  
pp. 479-511
Author(s):  
R. H. Waldman
Keyword(s):  
New York ◽  
North Atlantic ◽  
Cost Effective ◽  
Point Of View ◽  
Guidance System ◽  
Navigation Systems ◽  
The Past ◽  
The North ◽  
Separation Standards ◽  
Economic Requirement

The economic requirement for reductions in horizontal separation standards on high density oceanic routes such as the North Atlantic has motivated the search for a navigation and guidance system combining compatibility with foreseeable separation criteria while at the same time remaining cost effective. In this paper, by the Executive Vice-Chairman of the International Air Navigators' Council, an attempt is made from that point of view, to suggest various systems which are envisaged as meeting the most stringent requirements foreseen. Consideration is given to accuracy requirements, avionic hardware, and optimization of crew responsibilities based on airline experience derived over the past decade. Mr. Waldman is a navigator with Air Canada, but the views expressed are not necessarily those of the Air Canada Management.1. Introduction. In the spring of 1965, an I.C.A.O. Special North Atlantic Regional Air Navigation Meeting (NAT/ RAN) approved by a margin often to two a reduction in nominal lateral separation from 120 n.m. to 90 n.m. in the ‘principal area’. (The ‘principal area’ of the NAT Region is the area delineated by Gander Oceanic, Lisboa Oceanic, New York Oceanic, Reykjavik, Shanwick Oceanic, and Sondrestrom, South of 700 North.)

Archaeology of Identity and Dissonance

2019 ◽  
Author(s):  
Bernice Kurchin
Keyword(s):  
New York ◽  
Identity Formation ◽  
North Africa ◽  
North Atlantic ◽  
West Indies ◽  
Historical Time ◽  
The West ◽  
The Past ◽  
The North ◽  
Multiple Dimensions

In situations of displacement, disruption, and difference, humans adapt by actively creating, re-creating, and adjusting their identities using the material world. This book employs the discipline of historical archaeology to study this process as it occurs in new and challenging environments. The case studies furnish varied instances of people wresting control from others who wish to define them and of adaptive transformation by people who find themselves in new and strange worlds. The authors consider multiple aspects of identity, such as race, class, gender, and ethnicity, and look for ways to understand its fluid and intersecting nature. The book seeks to make the study of the past relevant to our globalized, postcolonized, and capitalized world. Questions of identity formation are critical in understanding the world today, in which boundaries are simultaneously breaking down and being built up, and humans are constantly adapting to the ever-changing milieu. This book tackles these questions not only in multiple dimensions of earthly space but also in a panorama of historical time. Moving from the ancient past to the unknowable future and through numerous temporal stops in between, the reader travels from New York to the Great Lakes, Britain to North Africa, and the North Atlantic to the West Indies.

The Work of the North Atlantic System Planning Group

1970 ◽  
Vol 23 (1) ◽  
pp. 20-22
Author(s):  
D. A. Blake
Keyword(s):  
North Atlantic ◽  
Point Of View ◽  
Operating Costs ◽  
The North ◽  
Systems Planning ◽  
Tidal Flows ◽  
The North Atlantic ◽  
Definition Of ◽  
Separation Standards ◽  
Planning Group

I propose to discuss the problem of long-range navigation from the point of view of the A.T.C. system planner and to describe in outline the work that has been done in the North Atlantic Systems Planning Group (N.A.T.S.P.G.). In this area there are tidal flows of traffic of relatively high density and there is inevitably a need to reduce separations as much as possible, consistent with safety, to ensure operating costs are reduced, or at least kept in bounds with anticipated increases in traffic. This requires a much more precise definition of an acceptable separation standard, and for future planning the establishment of a relationship between separation standards and navigational capability.

Famous teachers and educators of the first half of the XX century about the problems of the North Caucasian muslim education.

2021 ◽  
Vol 13 (2) ◽  
pp. 208-222
Author(s):  
Nadezhda O. Bleich ◽  
Keyword(s):  
Educational Process ◽  
Point Of View ◽  
Practical Significance ◽  
Past Century ◽  
North Caucasus ◽  
Caucasus Region ◽  
The Past ◽  
The North ◽  
New Type ◽  
Historical Heritage

The article is devoted to the consideration of the worldview positions of famous educators of the past century regarding the state of school education among Muslims of the North Caucasus region. It is proved that the enlighteners advocated the creation of a new type of national non-class school and the construction of the didactic foundations of the educational process in it. The novelty of the work is that, based on the analysis of the views of the advanced intelligentsia of the region, aimed at understanding the current socio-cultural situation, an attempt was made to scientifically understand the problems and prospects for the development of the Muslim educational system of the past from the point of view of the modern scientific paradigm. The practical significance of the publication lies in expanding the understanding of the system of Mohammedan education in the context of its historical heritage, which will help to comprehend modern problems associated with the reform of general and vocational education in the national Muslim republics.

scholarly journals The Meridional Shift of the Midlatitude Westerlies over Arid Central Asia during the Past 21 000 Years Based on the TraCE-21ka Simulations

2020 ◽  
Vol 33 (17) ◽  
pp. 7455-7478
Author(s):  
Nanxuan Jiang ◽  
Qing Yan ◽  
Zhiqing Xu ◽  
Jian Shi ◽  
Ran Zhang
Keyword(s):  
Indian Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
Last Deglaciation ◽  
The Past ◽  
The North ◽  
External Forcings ◽  
The Indian Ocean ◽  
The Last Deglaciation ◽  
The North Atlantic

AbstractTo advance our knowledge of the response of midlatitude westerlies to various external forcings, we investigate the meridional shift of midlatitude westerlies over arid central Asia (ACA) during the past 21 000 years, which experienced more varied forcings than the present day based on a set of transient simulations. Our results suggest that the evolution of midlatitude westerlies over ACA and driving factors vary with time and across seasons. In spring, the location of midlatitude westerlies over ACA oscillates largely during the last deglaciation, driven by meltwater fluxes and continental ice sheets, and then shows a long-term equatorward shift during the Holocene controlled by orbital insolation. In summer, orbital insolation dominates the meridional shift of midlatitude westerlies, with poleward and equatorward migration during the last deglaciation and the Holocene, respectively. From a thermodynamic perspective, variations in zonal winds are linked with the meridional temperature gradient based on the thermal wind relationship. From a dynamic perspective, variations in midlatitude westerlies are mainly induced by anomalous sea surface temperatures over the Indian Ocean through the Matsuno–Gill response and over the North Atlantic Ocean by the propagation of Rossby waves, or both, but their relative importance varies across forcings. Additionally, the modeled meridional shift of midlatitude westerlies is broadly consistent with geological evidence, although model–data discrepancies still exist. Overall, our study provides a possible scenario for a meridional shift of midlatitude westerlies over ACA in response to various external forcings during the past 21 000 years and highlights important roles of both the Indian Ocean and the North Atlantic Ocean in regulating Asian westerlies, which may shed light on the behavior of westerlies in the future.

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