Bilge Keel Design for the Traditional Fishing Boats of Indonesia's East Java
International Journal of Naval Architecture and Ocean Engineering 11 (2019) 380e395 Contents lists available at ScienceDirect International Journal of Naval Architecture and Ocean Engineering journal homepage: http://www.journals.elsevier.com/ international-journal-of-naval-architecture-and-ocean-engineering/ Bilge keel design for the traditional fishing boats of Indonesia's East Java * Wendi Liu a, , Yigit Kemal Demirel a, Eko Budi Djatmiko b, Setyo Nugroho b, Tahsin Tezdogan a, Rafet Emek Kurt a, Heri Supomo b, Imam Baihaqi b, Zhiming Yuan a, Atilla Incecik a a Department of Naval Architecture, Ocean and Marine Engineering University of Strathclyde, Glasgow, UK b Department of Naval Architecture and Shipbuilding, Marine Technology Faculty, Sepuluh Nopember Institute of Technology, Surabaya, Indonesia article info abstract Article history: Seakeeping, especially for the roll motions, is of critical importance to the safe operation of fishing boats Received 23 February 2018 in Indonesia. In this study, a traditional East Java Fishing Boat (EJFB) has been analysed in terms of its Received in revised form seakeeping performance. Furthermore, a bilge keel was designed to reduce the roll motions of the EJFB 17 July 2018 using multiple stages approach. After installing the designed bilge keels, it was shown that up to 11.78% Accepted 17 July 2018 and 4.87% reduction in the roll response of irregular seaways and the total resistance under the design Available online 9 August 2018 speed, respectively. It was concluded that the roll-stabilized-EJFB will enhance the well-being of the fisherman and contribute to the boats' safe operation, especially in extreme weather conditions. Keywords: East Java Fishing Boat Moreover, the total resistance reduction of the EJFB due to the installation of the designed bilge keels also fi Bilge keel resulted in increased operational ef ciency and reduced fuel costs and fuel emissions for local Roll motion stakeholders.
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