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:Remotely Operated Vehicles (ROVs)fall under the category of unmanned underwater vehicles and are used to traverse through different water resources ranging from lakes to sea. This paper aims to provide an overview of the evolution of ROVs from their inception in 1953 to modern adaptation. ROVs have grown in popularity as a result of their ability to dive to the deepest depths of the ocean and perform complex scientific tasks ranging from discovery to inspection for much longer periods of time while working in hazardous environments. ROVs are categorised based on various factors such as design, size, capacity, strength, and weight. The aim of this paper is to review and address various design parameters that have previously been considered by researchers. Advantages, drawbacks, and applicability ranges have been addressed based on the observations of several researchers.