Seakeeping analysis of an indian research vessel /

Abstract

A multidisciplinary research vessel Sagar Manjusha was considered for seakeeping analysis, which was exclusively used for deployment, maintenance and retrieval of data buoys, Tsunami buoys and so on. During rough sea conditions, the ship undergoes extreme rolling, which hinders deployment/retrieval operation. It also leads to seasickness for scientists and crew onboard. An experimental study was carried out to improve its seakeeping qualities. Ship Motion Reference Unit (MRU) data and the corresponding wave climate data were collected to study seakeeping capabilities. A model test was carried out in a towing tank facility and the design was optimized based on outcomes of test results. An Anti-Roll Tank (ART) was fabricated and installed on boatdeck. Inclination test was carried out in the presence of Indian Register of Shipping surveyor. Stability booklet was prepared as per class recommendation and the procedure was accepted by the class. It was observed during testing in rough sea condition that ship rolling had reduced by considerable amount, which in turn improved comfort and safety during extreme sea conditions. This experiment resulted in a transformation of an innovative idea into best outcome so that similar problems can be solved and the ship’s comfort, safety, productivity and so on can be improved considerably. Seakeeping analysis and installation of ART resulted in improvement in the safety of vessel, onboard machineries, instrument used for scientific research and quality of life onboard.