scholarly journals Research on key problems of Arctic navigation safety

2021 ◽  
Vol 1827 (1) ◽  
pp. 012094
Author(s):  
Hu Yahan ◽  
Ma Minglu
Keyword(s):  
Arctic Navigation ◽  
Navigation Safety

INTRODUCTION TO RISK AND SAFETY OF AIR NAVIGATION

2020 ◽  
Author(s):  
Fedja Netjasov
Keyword(s):  
Doctoral Students ◽  
Traffic Engineering ◽  
International Standards ◽  
Air Transport ◽  
Civil Aviation ◽  
Undergraduate Studies ◽  
Recommended Practices ◽  
The University ◽  
Navigation Safety

"Introduction to Risk and Safety of Air Navigation" is an authorized script compiled on the basis of the curriculum of the course "Introduction to Risk and Safety of Air Navigation" which is taught in undergraduate studies at the University of Belgrade - Faculty of Transport and Traffic Engineering. The scripts are primarily intended for students of undergraduate (bachelor) studies at the Department of Air Transport and Traffic at the University of Belgrade - Faculty of Transport and Traffic Engineering. Scripts can be useful to both master's and doctoral students at the University of Belgrade - Faculty of Transport and Traffic Engineering, especially those who have not completed undergraduate studies at the Department of Air Transport and Traffic. They can also be useful to air transport and aeronautical engineers in order to expand and update knowledge in the field of air navigation safety. The material presented in these scripts relates mainly to civil aviation and is largely based on international standards, recommended practices, regulations and documents which deal with issues related to air navigation safety. As these standards, regulations and documents are subject to frequent changes and alterations, users of these scripts are advised to also use the original (updated) documents, which are listed in the references, in order to take into account any changes that have occurred after the release of the scripts.

The Visibility of Stars during Twilight

1957 ◽  
Vol 10 (1) ◽  
pp. 11-16 ◽  
Author(s):  
Peter M. Millman
Keyword(s):  
Magnetic Compass ◽  
The Arctic ◽  
Relative Importance ◽  
The Moon ◽  
Heavenly Body ◽  
Flight Planning ◽  
Arctic Navigation

One of the problems in arctic navigation by astro is the twilight period. At this time, if the Moon is below the horizon, suitable objects for sextant observation are not easy to find. The difficulty is aggravated by the fact that on certain flight paths the arctic twilight may last for many hours. It must also be remembered that in these areas the behaviour of the magnetic compass and of radio aids are often unreliable and this increases the relative importance of astro-navigation. With the introduction of the periscopic sextant into air navigation it has become possible to pre-set the instrument for a given star or planet and satisfactory observations may be possible when the heavenly body is still below the level of casual perception for the unaided eye. In this connection it is necessary to know what stars are likely to be seen under twilight conditions if efficient flight-planning is to be carried out.

scholarly journals Navigation safety domain and collision risk index for decision support of collision avoidance of USVs

2021 ◽  
Vol 13 ◽  
pp. 340-350
Author(s):  
Jian Zhou ◽  
Feng Ding ◽  
Jiaxuan Yang ◽  
Zhengqiang Pei ◽  
Chenxu Wang ◽  
...  
Keyword(s):  
Decision Support ◽  
Collision Avoidance ◽  
Risk Index ◽  
Collision Risk ◽  
Navigation Safety

Navigation Safety Analysis in Taiwanese Ports

2006 ◽  
Vol 59 (2) ◽  
pp. 201-211 ◽  
Author(s):  
Chung-Ping Liu ◽  
Gin-Shuh Liang ◽  
Yuhling Su ◽  
Ching-Wu Chu
Keyword(s):  
Grey Relational Analysis ◽  
Safety Analysis ◽  
Port Authority ◽  
Relational Analysis ◽  
Marine Accidents ◽  
Grey Relational ◽  
Navigation Safety

Many researchers have studied vessel systems to enhance navigation safety at sea, or analysed the statistics of marine casualties of different flagged vessels as well as the fatalities and injuries in ferry accidents. However, little research has been devoted to port safety and especially navigation safety within Taiwanese territorial waters where over a 10-year period there have been 3428 marine accidents with 548 deaths and 524 vessels sunk. In this paper, we use the Grey Relational Analysis (GRA) to analyse the marine accident records of each of Taiwan's commercial ports from 1992–2003. Then, after interviewing the port authority managers and marine specialists, we discover the concerns felt by these professionals about Taiwanese commercial ports. We provide suggestions to strengthen port navigation safety.

RISK ASSESSMENT OF ARCTIC NAVIGATION BY USING IMPROVED FUZZY-AHP APPROACH

2021 ◽  
Vol 157 (A4) ◽  
Author(s):  
B Sahin ◽  
S Kum
Keyword(s):  
Fuzzy Ahp ◽  
Weather Conditions ◽  
Risk Identification ◽  
The Arctic ◽  
Risk Levels ◽  
Global Logistics ◽  
Geographical Position ◽  
Arctic Navigation ◽  
Hull Damage ◽  
Hierarchy Process

In this study, navigational risk factors of the Arctic Ocean are defined and numerical weights of each risk are obtained by using Improved Fuzzy Analytical Hierarchy Process (IF-AHP) method after conducting expert consultations. The Northern Sea Route shortens the maritime distance approximately 7000 nautical miles comparing to the conventional Suez Canal route. Therefore, it takes a significant role of being economic and time advantage for global logistics. Its geographical position, presence of ice, heavy weather conditions, strong currents and winds are some risks for Arctic transportation. There always have the possibility of unpredictable catastrophes such as a collision, grounding, hull damage and etc. in this region. Reflections of such unwanted incidents might be very costly for economic, political, environmental and safety concerns. Due to there are limited academic studies regarding to analytical and systematical risk identification and determination of risk levels, this study contributes to complete this academic gap.

scholarly journals Mapping of the maritime jurisdiction for Arctic Navigation

2019 ◽  
Vol 1 ◽  
pp. 1-1
Author(s):  
Haiyan Liu ◽  
Xiaoping Pang
Keyword(s):  
Arctic Ocean ◽  
Route Planning ◽  
Arctic Region ◽  
The Arctic ◽  
Law Of The Sea ◽  
The Arctic Ocean ◽  
United Nations Convention ◽  
Arctic Navigation ◽  
Navigation Planning ◽  
International Conventions

<p><strong>Abstract.</strong> In recent years, Arctic glaciers have gradually melted due to the global warming, which makes the exploitation of Arctic and its seabed resources possible. Though numerous disagreements and potentials over Arctic maritime jurisdiction still exist, the surround-Arctic nations have agreed the United Nations' Convention on the Law of the Sea to divide the Arctic Ocean into zones that can be regulated and exploited. The IBRU of Durham University has mapped the known claims, agreed boundaries and potential claims of the surround-Arctic nations in the Arctic to clear the maritime jurisdiction in the region. However, different countries may have different requirements within their jurisdictional areas. Clarifying these requirements is essential for Arctic Navigation of investigation ships and merchant ships for their route planning.</p><p>In this paper, based on the map of maritime jurisdiction and boundaries in Arctic region (IBRU), we analysed the international conventions and relevant laws of the surround-Arctic nations to find out the rights and obligations of ships in different zones. The limitations on activities and recommendations on navigation planning are marked for different zones according to different purposes, i.e. science or commerce. The map could not only provide navigational guidance for the activities in the Arctic Ocean, but offer references for the countries not surrounding the Arctic in the formulation of the Arctic strategies.</p>

scholarly journals DEVELOPMENT OF STRUCTURAL SOLUTIONS FOR PREVENTION OF WAVE RUN-UP OF THE BOW

2017 ◽  
pp. 7-14
Author(s):  
Pavel Evgenievich Burakovskiy
Keyword(s):  
Hydrodynamic Force ◽  
Stability Loss ◽  
Critical Value ◽  
Ship Hull ◽  
Hydrodynamic Impact ◽  
Hull Structure ◽  
Run Up ◽  
Hull Damage ◽  
Structural Solutions ◽  
Navigation Safety

One of the most dangerous situations for seagoing ships is wave run-up in a head sea. In such a case, significant hydrodynamic forces appear resulting in stability loss or ship hull damage. The paper presents structural solutions that contribute towards navigation safety by means of decreasing probability of wave run-up of the ship bow in a head sea. A design has been developed of a ship stabilizer in the form of hinge-mounted stabilizing wings which deflect from the hull when the bow submerges in water and then cling to it when it emerges. The paper presents a new design of the bulwark with rotating sections able to rotate in the direction from the deck to the board. These designs can reduce dipping in a wave and reduce hydrodynamic impact on the bow. Apart from this, a hull structure has been proposed with a detachable bow to prevent capsizing of a ship. If the hydrodynamic force reaches a critical value, destruction of a permanent joint will happen in the proposed design, resulting in the situation when leak-proof aft and bow parts detach and remain afloat, which will allow the crew to evacuate. The proposed designs will increase navigation safety in storm conditions.

scholarly journals Adjustment of Maintenance Approach for Improved Operability and Safety of Ship Navigation

2012 ◽  
Vol 22 (2) ◽  
pp. 95-103
Author(s):  
Ante Bukša ◽  
Ivica Šegulja ◽  
Vinko Tomas
Keyword(s):  
Risk Analysis ◽  
Lower Risk ◽  
Risk Index ◽  
Exhaust Valve ◽  
Maintenance Policy ◽  
Proposed Model ◽  
Risk Criterion ◽  
Ship Navigation ◽  
Definition Of ◽  
Navigation Safety

By adjusting the maintenance approach towards the significant components of ship’s engines and equipment, through the use of operational data from the ship machinery’s daily reports, higher operability and navigation safety can be achieved. The proposed maintenance adjustment model consists of an operation data analysis and risk analysis. The risk analysis comprises the definition of the upper and the lower risk criterion, as well as the definition of a risk index. If the risk index is higher than the lower risk criterion, the component is significant, while it is not significant and has an acceptable risk index if the risk index is lower than the lower risk criterion. For each significant component with a risk index found to be “unacceptable” or “undesirable”, an efficient maintenance policy needs to be adopted. The assessment of the proposed model is based on data regarding the power engine original operation throughout a 13-year period. The results of engine failure examinations reveal that the exhaust valve is the most vulnerable component with the highest rate of failure. For this reason the proposed model of adjusting the maintenance approach has been tested on the exhaust valve sample. It is suggested that the efforts to achieve higher ship operability and navigation safety should go in the direction of periodical adjustments of the maintenance approach i.e. choosing an efficient maintenance policy by reducing the risk indices of the significant engine components. KEY WORDS: maintenance adjustment approach, risk analysis, risk index, lower risk criterion, upper risk criterion, significant components, ship navigation

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