Open Access Open Access  Restricted Access Subscription or Fee Access

Development of a Ship Weather Routing Algorithm and its Application for Indian Coastal Sea Routes

Chinmaya Prasad Padhy, Debabrata Sen

Abstract


Ship routing is defined as a procedure to determine an optimal track for ocean voyages based on weather and sea conditions, and a ship’s individual response characteristics in waves. This paper describes an algorithm for finding the optimum path of a ship in a realistic irregular seaway, and its application for some typical coastal routes of India. The algorithm requires the irregular directional wave spectra as input. This oceanographic data set is generated using the satellite data provided by the meteorological department. There are a number of different approaches to calculate the shortest path/route between two nodes representing the start and destination ports. In this work, the Dijkstra’s algorithm which is based on the application of optimal control theory and dynamic programming techniques has been applied to obtain reliable optimum routing in random sea state. Loss of speed of a vessel in a seaway is not always due to the additional resistance in waves: the speed is often voluntarily reduced in order to decrease the violent heaving and pitching motions of the ship. In this ship routing algorithm, both speed loss due to wave resistance and voluntary speed reduction to control the motion, have been considered for the path finding algorithm.

Keywords


ship routing, path optimization, wave forecast, wave model, ship response in waves

Full Text:

PDF


Disclaimer/Regarding indexing issue:

We have provided the online access of all issues and papers to the indexing agencies (as given on journal web site). It’s depend on indexing agencies when, how and what manner they can index or not. Hence, we like to inform that on the basis of earlier indexing, we can’t predict the today or future indexing policy of third party (i.e. indexing agencies) as they have right to discontinue any journal at any time without prior information to the journal. So, please neither sends any question nor expects any answer from us on the behalf of third party i.e. indexing agencies.Hence, we will not issue any certificate or letter for indexing issue. Our role is just to provide the online access to them. So we do properly this and one can visit indexing agencies website to get the authentic information.