vessels it is quite difficult for navigatiors to observe visually waves accurately but the marine radar wave observation system can give them useful 2-dimensional wave information.
ACKNOWLEDGEMENTS
The authors would like to express their thanks to the captain and crew of the Techno Super Liner Hisho and members concerned with this on-board experiment for their effective arrangements and cooperation. A part of this research was supported by a Grant-in-Aid for Science Research from the Ministry of Education, Science, Sport and Culture.
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