Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 82, Issue 1 (2021) 133-144 133 Journal of Advanced Research in Fluid Mechanics and Thermal Sciences Journal homepage: www.akademiabaru.com/arfmts.html ISSN: 2289-7879 Design and Fabrication of Under Water Remotely Operated Vehicle Roman Kalvin 1 , Juntakan Taweekun 2,* , Muhammad Waqas Mustafa 3 , Faisla Ishfaq 3 , Saba Arif 1 1 Energy Technology Program, Faculty of Engineering, Prince of Songkla University Hat Yai, Thailand 2 Department of Mechanical Engineering, Faculty of Engineering, Prince of Songkla University Hat Yai, Songkhla 90112, Thailand 3 Department of Mechanical Engineering, Wah Engineering College, Wah Cantt., Pakistan ARTICLE INFO ABSTRACT Article history: Received 17 October 2020 Received in revised form 3 March 2021 Accepted 7 March 2021 Available online 20 April 2021 Underwater Remotely Operated vehicle is a tethered mobile vehicle most often used to monitor underwater oil and gas drilling inspection, telecommunications and homeland security. The main focus of this research is to design a vehicle at low cost which is safe, portable, and easy to use while increasing the maneuverability and efficiency to reach a depth of 5 meters. While conducting research a unique design is selected based on a novel fin propulsion mechanism rather than propellers. Propellers though have high speed but cannot work on low flow rates and their blades can be damaged if jelly fish or other material is struck in its shaft. Two shapes have been considered to remove above difficulties i.e. Fish and Turtle. Due to higher stability, larger area and greater hydrodynamic efficiency Sea Turtle has been selected, as it can easily overcome the forces like buoyancy, pressure and thrust force. The results extracted from this research shows that the underwater vehicles based on the biological locomotion principle can perform very well than other propeller counterparts. The research concludes with the performance of a working system that validates motion capabilities related to speed, depth and hydrodynamic efficiency which can be further improved by using sophisticated control systems, outer shell and highly integrated processors. Keywords: Propellers; Buoyancy; Thrust force 1. Introduction The design and implementation of underwater robot will be discussed in this paper. Rather than the conventional based propulsion by propellers, a novel bio-inspired propulsive mechanism similar to sea turtles is actualized. The main motivation of this research is to meet the round the clock underwater surveillance, sea exploration, scientific search and diving assistance. An underwater remotely operated vehicle (UROV) is considered best approach to achieve above objectives. One of the main trends for UROVs is “autonomy” for some specific tasks, such as position tracking, dynamic positioning (or station-keeping), auto-heading and auto depth control. The ROV system is highly maneuverable unmanned which is operated by a person using tethered cable or by sensors through remote. It is connected to the vehicle by a tether or known as an * Corresponding author. E-mail address: jantakan.t@psu.ac.th https://doi.org/10.37934/arfmts.82.1.133144