Open AccessDIAGRAM FOR DETERMINING DANGEROUS ZONES WHEN SAILING IN HEAVY WEATHER
Author(s) -
Sergei Veniaminovich Solnov,
Alexander Michailovich Boyarinov,
Andrey A. Ershov
Publication year - 2018
Publication title -
vestnik astrahanskogo gosudarstvennogo tehničeskogo universiteta. seriâ: morskaâ tehnika i tehnologiâ
Language(s) - English
Resource type - Journals
eISSN - 2225-0352
pISSN - 2073-1574
DOI - 10.24143/2073-1574-2018-2-22-27
Subject(s) - chart , seakeeping , marine engineering , slamming , storm , computer science , broaching , course (navigation) , operations research , hull , meteorology , aeronautics , simulation , engineering , mechanical engineering , mathematics , statistics , geography , aerospace engineering
One of the most serious factors which influences the safety of a ship in heavy weather is wave impact. Nowadays, there are no seakeeping regulations which provide safety of a ship when there is possibility of resonance rolling, broaching, slamming, parametric resonance. Current Russian Instructions for Watch keeping give general recommendations about ship handling in heavy weather. These Instructions order the navigators to use storm charts. The most popular diagrams are the storm charts by U. V. Remez and A. I. Bogdanov. It should be mentioned that it is quite difficult to use Remez and Bogdanov’s storm charts manually in stormy weather: a watch keeper has to make calculations, manual plotting, interpolations between lines of the chart. Some vessels use integrated automatic seakeeping systems which are capable to solve this task, but high price of such systems limits the possibility of their use. The article presents a chart of dangerous phenomena based on Yu.V.Remez and A.I.Bogdanov’s charts and available in Excel program. The chart is applicable both for deep water and for shallow water. Excel program automatically calculates and displays on the chart zones of main rolling, pitching and vertical resonance, as well as parametric resonance taking into account ship’s dimensions, draft, stability, state of sea. Besides, the program allows forecasting resonance when ship changes the course. Bringing the chart in is not difficult as all the data necessary for the program can be obtained on board a ship. Excel program is available on board of all ships.