Study On The Meteorological And Marine Conditions Influencing The Navigation Safety Of Roll-Roll Passenger Ship On Bohai Sea

The sailing ship is affirmatively influenced and restricted by the oceanic environment. The ship's safety and economic effects depend on whether the oceanic conditions are good or not. Particularly some synoptic systems conducing the storm and very high sea not only makes the ships be manipulated difficultly, but also brings about fearful shipwreck. Sometimes after the shipwreck happened, the salvage is difficulty due to the influence of severe weather and oceanic conditions. As a result the loss is aggravated. Therefore, this paper primarily studies the meteorological and marine condition influencing the Roll-Roll passenger ship's navigation safety. According to Bohai topographical characteristics, the distributed characteristics and diverse laws of the ocean current?tide?wind sea and swell are summarized. The wind's climatic characteristics and main synoptic system that causes Bohai sea storm are systematically analyzed in this paper, it is concluded that a few typical weather models could result in strong wind in Bohai Sea.Based on the research of the main synoptic systems which influence Bohai sea: strong cold air?tropical cyclone and extratropical cyclone, this paper brings forward several upper-air synoptic situations of strong cold air breaking out in Bohai area. In northwest Pacific Ocean, extratropical cyclone is in spatial-temporal distribution and the main forms affect Bohai Sea. Utilizing the equation of surface forecast, the seedtime of extratropical cyclone that influences Bohai Sea is theoretically analyzed. At the same time, the mechanism that the gust reinforces from the aspects of allobar field?thermodynamic circulation?temperature stratification etc is discussed. From the point of application for roll-roll passenger ship, the methods to forecast Bohai Sea strong wind and the need to properly handle several relations are introduced, and several methods to predict the strong wind on board are further summed up.Finally, the system of hydrology meteorology compiling in Delphi language is represented. Consequently, navigators of sailing to Bohai sea area at any moment can find out the diverse law of Bohai's climate and take proper measures, hoping to obtain maximum benefits and avoid harms, guarantee the sailing safety and reduce the losses caused by the severe weather and oceanic condition to maximum extent.