Abstract
In the major bays vessels might harborage in congested waters under stomy weather. Moreover in the current technical standard for port planning, an equation to estimate the necessary size of water for harborage is missing. In this styudy, the actual behavior of harborage in the major bays is captured and analyzed by AIS and the relevance of the said equation is examined, and utilization of the equation for the estimation of water area is discussed further in order to secure safer use of such bay waters.
