scholarly journals Ship security when swimming near the storm center

2019 ◽  
Vol 2(475) ◽  
pp. 3-7
Author(s):  
Oleh Yu. Nesterov ◽  
Serhii P. Yatsenko
Keyword(s):  
2015 ◽  
pp. 179-187
Author(s):  
Benny Daniel J.
Keyword(s):  

2021 ◽  
Vol 6 (166) ◽  
pp. 204-210
Author(s):  
O. Melnyk ◽  
S. Onyshchenko ◽  
O. Lohinov ◽  
V. Okulov ◽  
I. Pulyaev

Maritime security in recent decades has always been a separate issue, one that has been acute for both shipowners and crews of seagoing vessels. It has been marked by periods of relative stability and periods of emerging and growing threats, from the days of the sailing fleet to the era of ironclad steam shipbuilding. Certainly, it is difficult to overestimate the significant role of the scientific community, which has long investigated this problem, revealing its theoretical and practical sides. The professional experience of maritime industry specialists has also sufficiently served to ensure that systematic interest in the issue has provided the basis for the development of strategies and integrated approaches that ensure the safety of vessels and crews at modern levels. Without the latest advances in maritime safety, shipping, as an industry, would not be able to achieve the current level of reliability in ensuring shipboard processes. Every generation of mankind has prioritized maritime safety, contributing to improving its standards and stressing the importance of continuous development of the theoretical framework. At least more than twenty million tons of cargo and more than five hundred thousand passengers move daily by water transport, so the concept of maritime safety extends not only to the safety of life at sea, the safety of vessels and the safety of cargo, but also to the prevention of maritime accidents and pollution. The increasing share of maritime and river transport in international freight and passenger traffic has led to the need for increased maritime safety requirements due to the technical upgrading of maritime transport. This process is based on the principles of current control over the process of vessel operation and prompt acquisition of necessary data and relevant information during the voyage, anticipated route and control over the state of work parameters of technical means of the vessel, but the key aspect of safety is assessment of existing threats and development of ways and methods of ensuring vessel safety.


1971 ◽  
Vol 24 (3) ◽  
pp. 424
Author(s):  
Laurence Lieberman
Keyword(s):  

2019 ◽  
Vol 58 (9) ◽  
pp. 1993-2003 ◽  
Author(s):  
David Mayers ◽  
Christopher Ruf

AbstractA new method is described for determining the center location of a tropical cyclone (TC) using wind speed measurements by the NASA Cyclone Global Navigation Satellite System (CYGNSS). CYGNSS measurements made during TC overpasses are used to constrain a parametric wind speed model in which storm center location is varied. The “MTrack” storm center location is selected to minimize the residual difference between model and measurement. Results of the MTrack center fix are compared to the National Hurricane Center (NHC) Best Track, the Automated Rotational Center Hurricane Eye Retrieval (ARCHER), and aircraft reconnaissance fixes for category 1–category 3 TCs during the 2017 and 2018 hurricane seasons. MTrack produces storm center locations at intermediate times between NHC fixes with a factor of 5.6 overall reduction in sensitivity to uncertainties in the NHC fixes between which it interpolates. The MTrack uncertainty is found to be larger in the cross-track direction than the along-track direction, although this behavior and the absolute accuracy of position estimates require further investigation.


Author(s):  
Marcelo R. Martins ◽  
Daniel F. da Silva ◽  
Fabio M. Maruyama ◽  
Fabio F. Loriggio ◽  
Marcelo F. Pedro ◽  
...  

In this paper it is presented a brief description of a method that consists in using Bayesian Belief Network (BBN) created by converting Fault Trees (FT) to determine the most probable causes of a failure in a system given some evidence through observation. In addition, it is presented an example based on the steering gear system of a containership focusing on the cases in which the vessel is operating in restricted waters or performing the procedure for mooring/unmooring. The steering gear system was chosen due to its importance to restricted water navigation and to the mooring operation. The system must be completely available for these situations; otherwise, the ship security and the crew safety are implicated.


Atmosphere ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 942
Author(s):  
Benjamin Davis ◽  
Xuguang Wang ◽  
Xu Lu

Six-hourly three-dimensional ensemble variational (3DEnVar) (6H-3DEnVar) data assimilation (DA) assumes constant background error covariance (BEC) during a six-hour DA window and is, therefore, unable to account for temporal evolution of the BEC. This study evaluates the one-hourly 3DEnVar (1H-3DEnVar) and six-hourly 4DEnVar (6H-4DEnVar) DA methods for the analyses and forecasts of hurricanes with rapidly evolving BEC. Both methods account for evolving BEC in a hybrid EnVar DA system. In order to compare these methods, experiments are conducted by assimilating inner core Tail Doppler Radar (TDR) wind for Hurricane Edouard (2014) and by running the Hurricane Weather Research and Forecasting (HWRF) model. In most metrics, 1H-3DEnVar and 6H-4DEnVar analyses and forecasts verify better than 6H-3DEnVar. 6H-4DEnVar produces better thermodynamic analyses than 1H-3DEnVar. Radar reflectivity shows that 1H-3DEnVar produces better structure forecasts. For the first 24–48 h of the intensity forecast, 6H-4DEnVar forecast performs better than 1H-3DEnVar verified against the best track. Degraded 1H-3DEnVar forecasts are found to be associated with background storm center location error as a result of underdispersive ensemble storm center spread. Removing location error in the background improves intensity forecasts of 1H-3DEnVar.


2014 ◽  
Vol 14 (2) ◽  
pp. 201-217 ◽  
Author(s):  
Hans Liwång ◽  
Karl Sörenson ◽  
Cecilia Österman

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