Shiphandling Simulation Application to Waterway Design (1992) / Chapter Skim
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3. Use of Simulation in Waterway Design
3. Use of Simulation in Waterway Design
Pages 23-30
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From page 23... ...
Simulation estimates the trajectory of design vessels that will use, or are projected to use, the waterway during its design life. Carefully designed simulator runs are used to gather the data that are then analyzed to draw conclusions about optimum or required minimum waterway dimensions and orientation, as well as ship operating procedures.
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From page 24... ...
Two other principal components in Figure 3-1 are the external environmental forces and the external visual environment. These blocks represent all of the external influences on the ship and on pilot behavior that are unique to the waterway, including channel topography, atmospheric visibility, tide, waves, currents, and wind, as well as the geographic features, such as aids to navigation, buildings, and bridges, that constitute the waterway Environmental | Visual - _ ~~[ Wind Ambient Light .
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From page 26... ...
These simulations can be used in calibrating the pilot model for fasttime simulations, answering questions concerning navigational aids, and assessing piloting under difficult situations (complex bathymetry or environmental conditions, passing bridges or other marine traffic, and so on) where human decisions are critical.
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From page 27... ...
The committee believes Mat applying simulation in waterway design relies on the following inherent working assumption: A link ted number of simulations using a less-than-perfect simulator, a few select (design) ship types, a few select environmental conditions over extreme ranges characteristic of the local area, and a few pilots with representative local expertise and shiphandling proficiency are sufficient to obtain a useful appraisal of waterway design.
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From page 29... ...
In addition, some waterway designers may not be comfortable with changes from traditional techniques with which they are very familiar to a process that not only may not be familiar to them but also would expand participation beyond the traditional design community. Because real-time simulation is human resource intensive, the capability for quickly modifying inputs to the mathematical model which describe the waterway and its environment is desirable to facilitate assessment of design alternatives.
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From page 30... ...
Nonetheless, useful technical information concerning the vessel track can be obtained, and consensus building among the conflicting parties in the waterway design can be achieved.
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