Design and construct a remotely operated vehicle (ROV) which fitted with three thrusters, a video transmission and a control system for the manoeuvrability is the main target of this project. This ROV is made up from aluminium frame and water proof enclosure to protect the controller system. Besides, this project also develop a closed loop system for auto depth function. This auto depth function is very important to make sure that the ROV is always at the desired depth. In addition, this ROV is also equipped with on board power to avoid the voltage drop along tether. The scope of studies for this project divided into two which are electrical and mechanical part. For the electrical part, the best controller circuit design need to be designed to ensure it gives the best manoeuvrability. Meanwhile, for mechanical part, the frame of the ROV need to be designed based of few considerations
