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Currently, various water depth interpolation methods used to construct nonnavigable shallow areas are simply and indiscriminatingly used without taking their respective adaptabilities into consideration. Firstly, three typical methods used to estimate a water depth at an arbitrary position on a chart are summarized as follows: (1) estimating the depth with the shallowest depth of the three vertexes...
To ensure safe ship navigation, true water depths should be deep enough with respect to the corresponding depths on a chart. Therefore, a set of basic quality indices, including an index of the probability of adequate depth, were developed to evaluate the quality of a digital depth model (DDM) with respect to navigational safety. In addition, these methods are proposed for assessing the probability...
A shortest routing is crucial in emergent navigations including rescue and military applications. This paper proposes an automatic method of the shortest routing for emergent navigation. Firstly, un-navigable shallow areas are obtained by tracing safety contour for the ship navigation, and they are processed together with other obstacle areas. Then navigable paths are tested based on the predefined...
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