scholarly journals Research on determination method of the true visibility on vessels based on radar and light intensity chart of the lighthouse

2021 ◽  
pp. 132-136
Author(s):  
Т.З. Нгуен

Определение истинной видимости является основной морской метеорологической операцией дежурного офицера на борту. В условиях ограниченной видимости суда должны работать в соответствии с Правилом 19 Международных правил предотвращения столкновений на море. Однако в настоящее время нет документов, которые бы четко и количественно давались в руководстве по определению видимости на море. С другой стороны, системы управления безопасностью некоторых судоходных компаний выдают предупреждения, и дежурный офицер должен уведомить или вызвать капитана, когда видимость упадет до определенного предела. Это затрудняет для дежурного офицера принятие независимого решения об избежании столкновения в случае ухудшения видимости. В целях содействия решению актуальной морской проблемы, о которой говорилось выше, целью данной работы является исследование метода определения видимости на борту судна в определенных погодных условиях. Determining the true visibility is a basic marine meteorological operation of the duty officer on board. In the restricted visibility condition, vessels must sailing in accordance with Rule 19, International regulations for preventing collisions at sea. However, there are currently no documents that given clearly and quantitative in the guidance for determining visibility at sea. Otherwise, the warnings in the safety management systems of some shipping companies were given, and the officer of watch must inform or call the captain when the visibility reduced to a certain limit. This makes it difficult for the officer of watch to give the independent collision avoidance decision in the event of reduced visibility. In order to contribute to solve the actual maritime problem which is mentioned above, the goal of the paper is research on determine method of the visibility on board in a certain weather condition.

2021 ◽  
Author(s):  
Toni Wäfler ◽  
Rahel Gugerli ◽  
Giulio Nisoli

We all aim for safe processes. However, providing safety is a complex endeavour. What is it that makes a process safe? And what is the contribution of humans? It is very common to consider humans a risk factor prone to errors. Therefore, we implement sophisticated safety management systems (SMS) in order to prevent potential "human failure". These SMS provide an impressive increase of safety. In safety science this approach is labelled "Safety-I", and it starts to be questioned because humans do not show failures only. On the contrary, they often actively contribute to safety, sometimes even by deviating from a procedure. This "Safety-II" perspective considers humans to be a "safety factor" as well because of their ability to adjust behaviour to the given situation. However, adaptability requires scope of action and this is where Safety-I and Safety-II contradict each other. While the former restricts freedom of action, the latter requires room for manoeuvring. Thus, the task of integrating the Safety-II perspective into SMS, which are traditionally Safety-I based, is difficult. This challenge was the main objective of our project. We discovered two methods that contribute to the quality of SMS by integrating Safety-II into SMS without jeopardizing the Safety-I approach.


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