Optimum tracking of ship routes in 3g-WAM simulated rough weather using IRS-P4 (MSMR) analysed wind fields |
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| Authors: | J K Panigrahi J K Tripathy P A Umesh |
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| Institution: | (1) DHI-NTU Research Centre, DHI Water and Environment, 200, Pandan Loop, Pantech-21, Singapore, 128388, Singapore;(2) Department of Ocean Engineering and Naval Architecture, Indian Institute of Technology, Kharagpur, India;(3) Naval Physical and Oceanographic Laboratory, Kochi, 682021, India |
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| Abstract: | Rough weather ship routing is studied using model hindcast wave climate. With the launch of IRS-P4 (OCEANSAT-I), it became
possible to carry out routine wave forecasting over the Indian Ocean. The MSMR channel of the satellite gives scalar wind,
which is analysed at National center for Medium Range Weather Forecasting (NCMRWF), India for converting to vector winds.
The same is used as input to third generation wave model for the rough weather month of July 2000. Simulations are carried
out using Cycle-4 of third generation spectral wave model WAM for regional grid system. This simulated wave climate formed
the basis for computing effective ship velocity in the irregular seaway. This study gives a quantitative estimation of change
in ship velocity in the open Indian Ocean for a Liberty type ship. The optimal route is charted using Dijkstra’s algorithm
for minimal time path between Calcutta and Sumatra. The optimum track information has broad scope for obtaining a safer route,
least time route by avoiding delay in schedule with minimum fuel consumption. |
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